| 单词 | porosity |
| 例句 | Its shore could not be called a beach, there being neither sand nor pebbles, and there was no pounding of surf either, since the waves that fell upon the island simply vanished into its porosity. Life of Pi 2001-09-01T00:00:00Z “Some people think it’s blond or dark chocolate. Not the case. Take your time finding your shade and do test strands to figure out the porosity of your hair.” Why Is Everyone Going Brunette? 2021-12-28T05:00:00Z “The Gundlach building looks the way it does because the community wanted it,” Mr. Sirén said, emphasizing its porosity. Buffalo Remakes its Museum in its Own Image 2023-04-27T04:00:00Z Like “Annihilation,” “Gaia” understands that the porosity of the boundaries between the human body and its environment is as beautiful as it is terrifying. Five International Movies to Stream Now 2021-10-22T04:00:00Z Clearly the Modern’s “museal porosity” is most extreme in the atrium. Hold That Obit; MoMA?s Not Dead 2010-12-30T16:49:20Z “We asked for no front door — total porosity,” she said. The Spiritual and Spectacular Meet at an Ultramodern Community Center in Connecticut 2015-10-16T04:00:00Z Ms. Christov-Bakargiev seems to have intended it to be the first of its kind in terms of its sheer porosity, the way it blends with the world. Art Review: Documenta 13 in Kassel, Germany 2012-06-14T21:44:01Z If the porosity varies, paint dries unevenly, leading to a splotchy look. What to do when painted-over wallpaper starts to show its edges 2018-11-25T05:00:00Z “There’s much more porosity in the art world now between the market, the collector base, galleries and the nonprofit world of museums,” Mr. Shiner said. Warhol Museum Director to Join Sotheby’s New Fine Art Division 2016-07-07T04:00:00Z The porosity of all those gates prompts the question of what, to the builders of Hadrian’s Wall, constituted a border. The Walls Before Trump’s Wall 2016-12-11T05:00:00Z He ponders the qualities of daylight and of building materials, their roughness, smoothness, patination and porosity. Outcry over Glasgow School of Art extension 2011-02-25T19:22:40Z Formerly bordered on three sides, the alcoves have been reconfigured with walkways that ease visitor circulation and, on a conceptual level, reflect the porosity between these communities. Museum of Natural History’s Renewed Hall Holds Treasures and Pain 2022-05-05T04:00:00Z The gallery block feels like an ordinary box, and although the project is in theory about porosity and flow, its internal circulation is cramped and stuttering. Museum of the Civilisations of Europe and the Mediterranean (MuCEM) – review 2013-06-08T23:05:15Z Differences in the porosity of the brick or previous paint layers might explain why the growth is only on the new section of your house. What’s that green stuff growing on the outside of the house? 2019-02-15T05:00:00Z “Every curl pattern is different. You have low porosity here. You have high porosity there. Which products do you use according to your hair type? There was no one talking about that.” Black Women Make Waves in Hair Care 2021-12-09T05:00:00Z Spinal scans and microscopic examination of bone tissue confirmed there was reduced degeneration and porosity within the endplates, as well as reduced separation between them, in the treated mice. Drug that kills off sleeping bone cells could treat lower back pain 2023-11-14T05:00:00Z Until now, structures with isotropic porosity have been applied, but these have the drawback that they exponentially attenuate the incident solar radiation as it travels into the reactor. 3D printed reactor core makes solar fuel production more efficient 2023-10-27T04:00:00Z Kriegman hypothesizes that porosity removes weight and adds flexibility, enabling the robot to bend its legs for walking. Instant evolution: AI designs new robot from scratch in seconds 2023-10-03T04:00:00Z Once the sample container is fully opened in the coming days, the team will sort through the collected pebbles, using instruments built into the glove boxes to measure the rocks’ volume, shape, mass, and porosity. NASA delivers bounty of asteroid samples to Earth 2023-09-24T04:00:00Z There are different curl patterns, porosity, and thicknesses of hair. What does your hair actually need? 2023-08-22T04:00:00Z Fortunately, adding compost and organic material, like dried leaves and garden trimmings, increases the porosity of clay and acts like a moisture and nutrient retaining sponge in sandy soil. Healthy soil is the foundation of a healthy garden; here’s how to test yours 2023-03-11T05:00:00Z "The porosity we have allows us to reach more distant places and offer services where there are none. We are in every Mexican state," Carrion said in an interview on Wednesday. FEMSA's fintech arm eyes 10 million users in Mexico by 2023 2022-10-20T04:00:00Z Too much porosity with air space, such as in sandy or gravelly soils, can lead to less available water to plants, especially during dry seasons when the water table is low. Environmental Biology 2018-09-06T00:00:00Z Primary porosity is represented by the spaces between grains in a sediment or sedimentary rock. Physical Geology 2015-01-01T00:00:00Z This is more useful in tighter sediments, especially shale, which has a high porosity to store the hydrocarbons but low permeability to transmit the hydrocarbons. An Introduction to Geology 2017-01-01T00:00:00Z The Coloright system looks like a high-tech booth and includes a virtual try-on for 1,500 shades, as well as a hair assessment where you can measure the color of your hair and its porosity. L’Oreal’s newest gadget takes the mess out of coloring your hair 2022-01-03T05:00:00Z Tarnas and his colleagues evaluated the grain sizes, mineral makeup and radioactive element abundance in Martian meteorites and estimated the Martian crust’s porosity using satellite and rover data. Martian Crust Could Sustain Life through Radiation 2021-08-12T04:00:00Z Franklin wanted to understand the porosity of coal, mainly to learn how to make it burn more efficiently. Rosalind Franklin was so much more than the ‘wronged heroine’ of DNA 2020-07-20T04:00:00Z The typical ranges in porosity of a number of different geological materials are shown in Figure 14.2. Physical Geology 2015-01-01T00:00:00Z Well-sorted sediments have higher porosity because there are not smaller sediment particles filling in the spaces between the larger particles. An Introduction to Geology 2017-01-01T00:00:00Z Many emerging tools, such as using nuclear magnetic resonance to study ground porosity, show potential but need further development. NSF pushed to boost funding for dating and squeezing rocks 2020-05-19T04:00:00Z But the chute was subsequently modified to increase its porosity by cutting open some of its panels. Confidence high in British land speed record team 2019-11-06T05:00:00Z The researchers subjected these samples to a variety of analyses, from porosity to ability to conduct heat. Viking History Is Melting Away in Greenland 2019-07-11T04:00:00Z Primary porosity tends to be higher in well-sorted sediments compared to poorly sorted sediments, where there is a range of smaller particles to fill the spaces made by the larger particles. Physical Geology 2015-01-01T00:00:00Z Clays generally have very high porosity, but the pores are poorly connected, thereby causing low permeability. An Introduction to Geology 2017-01-01T00:00:00Z Nutritional deficiencies are common; conditions like anemia and scurvy leave characteristic bone porosities. A Colonial-Era Cemetery Resurfaces in Philadelphia 2019-03-25T04:00:00Z Though I’m not religious, I experience an openness or porosity, a wash of wellbeing. Can a sleepless night awaken creativity? 2018-12-15T05:00:00Z With the right amount of porosity, the same vortex appeared. Drifting Dandelion Seeds Produce a Vortex Never Before Seen 2018-10-23T04:00:00Z Glacial till, which has a wide range of grain sizes and is typically formed under compression beneath glacial ice, has relatively low porosity. Physical Geology 2015-01-01T00:00:00Z Shale is a common source of fossil fuels with high porosity but it has very low permeability. An Introduction to Geology 2017-01-01T00:00:00Z The pappus’s porosity — a measure of the proportion of air that it lets pass — determines the shape and nature of the low-pressure vortex. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z “This particular shade cloth at once evokes this idea of a barrier, as well as a porosity that invites people to think about possible transgression,” Kiwanga told the Art Newspaper. Frieze New York: how this year's art fair got political 2018-05-03T04:00:00Z It asked for an exemption from the tariff which, if granted, would further illustrate the porosity of the “national security” definition. The Flaw in Trump’s National Security Tariffs Logic 2018-03-09T05:00:00Z The grain size, sorting, compaction, and degree of cementation of the rocks all influence primary porosity. Physical Geology 2015-01-01T00:00:00Z Water is found throughout porosity in sediments and bedrock. An Introduction to Geology 2017-01-01T00:00:00Z But it takes a rare combination of size, mass, shape and, crucially, porosity for the pappus to generate this vortex ring. Revealed: the extraordinary flight of the dandelion 2018-10-16T04:00:00Z Petford, N. Controls on primary porosity and permeability development in igneous rocks. Primordial clays on Mars formed beneath a steam or supercritical atmosphere 2017-12-05T05:00:00Z “We try to create porosity and permeability so that water can move in the ways that it moves in the hydrological cycle,” says Womack. What would an entirely flood-proof city look like? 2017-09-25T04:00:00Z Igneous or metamorphic rocks have the lowest primary porosity because they commonly form at depth and have interlocking crystals. Physical Geology 2015-01-01T00:00:00Z Here, we use ESF maps to guide us to molecular materials with remarkable porosity levels and high predicted gas selectivities, avoiding any assumptions or intuitive guesses about the crystal packing. Functional materials discovery using energy–structure–function maps : Nature : Nature Research 2017-03-21T04:00:00Z In El Paso, where 80% of residents are of Latino origin, his life reflects the porosity of the border. Life on the US-Mexican border: 'I can't imagine El Paso without Juárez' 2017-01-25T05:00:00Z Property rights will be secured, but the “porosity” of the structures allows them to be customised, and leaves room for a higher level of urban intensity in the future. Two billion more people will live in cities by 2035. This could be good – or very bad 2016-10-19T04:00:00Z Parts of the surface, like the rocky region where Rosetta’s lander Philae wound up, are more dense, with a porosity lower than 50 percent. Rosetta Spacecraft to End Mission by Sinking to Its Comet Companion 2016-09-30T04:00:00Z A body of sediment that has 25% porosity and is saturated with water weighs approximately 13% more than it does when it is completely dry, so the gravitational shear force is also 13% higher. Physical Geology 2015-01-01T00:00:00Z These spikes are an immediate indication that T2 might be a better choice for porosity generation than its imide analogue T1, even without analysis of the various predicted structures. Functional materials discovery using energy–structure–function maps : Nature : Nature Research 2017-03-21T04:00:00Z The porosity of walls is best illustrated by the most famous of all pre-modern barrier walls: the 5,500-mile-long Great Wall of China. For five millennia, politicians have proposed walls like Trump’s. They don’t work. 2016-07-29T04:00:00Z Other than that, the main porosity I found was Companies House. Passwords, phones and privacy settings: how to protect yourself online 2016-04-19T04:00:00Z But data are lacking for other key parameters, such as the rock porosity, which adds greatly to the uncertainty of these projections. Can fracking power Europe? 2016-02-29T05:00:00Z Secondary porosity is porosity that has developed after the rock has formed. Physical Geology 2015-01-01T00:00:00Z We therefore anticipate that T2E might be resistant to loss of porosity, so long as it remains crystalline, which is not obvious from the molecular structure in isolation. Functional materials discovery using energy–structure–function maps : Nature : Nature Research 2017-03-21T04:00:00Z By contrast, the ‘porosity’ in conventional liquids is limited to poorly defined and transient cavities between their molecules. Liquid with Holes in It Created 2015-11-16T05:00:00Z The day-to-day porosity between politics and journalism has closed up in recent decades. The Journalist Who Was His Own Inside Source 2015-09-28T04:00:00Z Diffusion rates into materials like concrete are primarily a function of moisture content and will depend strongly upon weather conditions and porosity of the materials. Israel Experiments With A Weapon Of Mass Disruption 2015-06-12T04:00:00Z It can include fracture porosity — space within fractures in any kind of rock. Physical Geology 2015-01-01T00:00:00Z Because of its porosity and low density, impacts on Hyperion tend to create punched-in craters with little to no ejecta, giving it its strange spongelike appearance. Cassini Spacecraft Sees Saturn's Moon Hyperion One Last Time 2015-06-03T04:00:00Z Because female basalt had been mined to depletion, the porosity in many of the reconstructed stone blocks was ersatz; still, one had the sense of entering a living structure. Atoning for a Genocide | The New Yorker 2014-12-29T05:00:00Z He calculated the porosity of the oviraptorosaurus eggs and compared them with the porosity of modern eggs in buried nests and open nests. Heavy dinosaurs found a way to brood their eggs 2014-11-06T05:00:00Z That sort of porosity is the defining characteristic of myth – and Holmes did indeed almost instantly become a myth. Sherlock Holmes: dispelling the myths 2014-10-11T04:00:00Z Some volcanic rock has a special type of porosity related to vesicles, and some limestone has extra porosity related to cavities within fossils. Physical Geology 2015-01-01T00:00:00Z But in rural landscapes of scattered forest, small villages, and trails, that porosity can’t be fixed with a few checkpoints. Ebola and the New Isolationsism 2014-10-06T04:00:00Z "Carbon is one of the promising materials considered for use in supercapacitors due to its low cost, high porosity, electronic conductivity and stability," the study added. Butt batteries: Scientists store energy in used cigarette filters 2014-08-06T04:00:00Z The difference could be related to the porosity of the material, Anderson said. Could shared sex toys transmit HPV? 2014-04-23T17:38:02Z “Within two weeks you could feel hard tissue, and within three months we saw on the CT scan that it almost matched the density and porosity” of the remaining jaw bone. Well Pets: Rebuilding Our Badly Broken Pets 2014-01-13T22:20:27Z Unconsolidated sediments tend to have higher porosity than consolidated ones because they have no cement, and most have not been strongly compressed. Physical Geology 2015-01-01T00:00:00Z One common problem is porosity - small air bubbles in the product. 3D printing 'entering the metal age' 2013-10-15T10:22:31Z "But the risks of porosity are less than the risks of doing nothing." Insight: France gambles on Syrian rebels as arms decision nears 2013-06-13T12:35:16Z It then combines that with data on root structure and soil porosity to write crop insurance for thousands of farmers. Active in Cloud, Amazon Reshapes Computing 2012-08-28T01:16:28Z More important than the incremental increase in campaign-law porosity, though, was the passionately phrased celebration by Justice Anthony Kennedy of political spending in its manifold forms. Karl Rove: He's Back, Big Time 2012-07-26T10:00:12Z Most of their porosity comes in the form of secondary porosity in fractures. Physical Geology 2015-01-01T00:00:00Z Each ballonet is theoretically proof against leakage--in practice there is an almost inappreciable porosity, which hardly counts for a comparatively short period, say a month. The Airship "Golden Hind" 2012-04-21T02:00:26.983Z David Friedberg, a former product manager at Google, has started the Climate Corporation, which uses government data on weather, soil porosity and the root structures of wheat and soybeans to write crop insurance. Factual?s Gil Elbaz Wants to Gather the Data Universe 2012-03-24T20:45:37Z The character of the site is mainly determined by its dryness, by the presence or absence of organic matter in the soil, and by its porosity taken in connection with the character of the vicinity. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The porosity of the building material determines the interchange of the air through the walls, and it affects the temperature of the rooms. Essays In Pastoral Medicine 2012-03-05T03:00:09.993Z Of the consolidated rocks, well-fractured volcanic rocks and limestone that has cavernous openings produced by dissolution have the highest potential porosity, while intrusive igneous and metamorphic rocks, which formed under great pressure, have the lowest. Physical Geology 2015-01-01T00:00:00Z For the growth of pot plants sand is an essential part of most composts, in order to give them the needful porosity to carry off all excess of moisture from the roots. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 7 "Horticulture" to "Hudson Bay" 2012-03-04T03:00:13.390Z So "porosity" is one characteristic that can help tell you what kind of rock you have. Rock Solid? How Particles Affect Porosity 2012-03-01T15:15:00.240Z The causes of inflammation are to be regarded as those which produce an increased porosity of the vessel wall without causing its death, for no exudation escapes from a dead vessel, its contents becoming clotted. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z They work with geologists, geophysicists and other specialists to study layers and porosity of rock with seismic data maps and rock samples. In oil boom, petroleum engineers hottest commodity 2012-01-18T16:28:29Z We have now seen that there is a wide range of porosity in geological materials and an even wider range of permeability. Physical Geology 2015-01-01T00:00:00Z Added to some clays to increase refractories or porosity. Pottery, for Artists Craftsmen & Teachers 2011-12-10T03:00:15.097Z For example, if the air took up one half cup and the cup could hold one cup total, the porosity would be 50 percent. Rock Solid? How Particles Affect Porosity 2012-03-01T15:15:00.240Z Such exceptional mortality over so wide a territory has been ascribed to the extreme porosity and humidity of the soil, which is nearly all below the level of the sea. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z There are various ways of producing this porosity, which need not trouble us here, however. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z The porosity of borders to human talent’s movement facilitates ingenuity-sparking collisions to our benefit. Migration in America: Vibrant Flux 2011-11-16T15:45:46Z In the absence of a mass measurement, one might naively assume a porosity of about 20 percent for a similar-looking asteroid, Asphaug says. Hard Rock: Asteroid Lutetia May Be an Intact Leftover from Planetary Formation 2011-10-28T21:45:05.277Z What is the porosity of each of the cups of the different-size rocks? Rock Solid? How Particles Affect Porosity 2012-03-01T15:15:00.240Z The results obtained from these tests correspond to those of the former tests, and led to the conclusion that the porosity of linseed oil films varied when different pigments were used in the oil. Paint Technology and Tests 2011-09-15T02:00:12.263Z On the other side of the table, assistant head chef Nick Holt's secondary menu seemed to consist of a dairy delicacy made in Switzerland that's quite well known for its porosity. What sports readers are saying 2011-09-11T03:11:00Z All varieties have the slightest porosity, and take their places among the most distinguished slates in the world. A West Country Pilgrimage 2011-08-05T02:00:48.947Z That done, sections of the core 2-3cm long, whose porosity is of particular interest, are subject to further study. Prospecting for oil: Grains of truth 2011-07-27T17:30:46Z Do different types of soils have different porosities? Rock Solid? How Particles Affect Porosity 2012-03-01T15:15:00.240Z Thin sections will allow us to look at the porosity and microstructure of the eggshell. Dinosaur Egg Clutches, Not as Simple as Chicken Eggs 2011-07-05T10:15:00.457Z Owing to the porosity of the earthenware the liquid was remarkably cool. Rounding up the Raider A Naval Story of the Great War 2011-06-24T02:00:25.163Z Serotonin can be vital or spiteful, offering calm in adversity or skeletal porosity. Basics: Job Description Grows for Our Utility Hormone 2011-05-02T22:05:21Z The successful practice of draining in a great measure depends on a proper knowledge of the superficial strata, of their situation, relative degrees of porosity, &c. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z You can see how this process, known as compaction, makes the rock's porosity decrease with time. Rock Solid? How Particles Affect Porosity 2012-03-01T15:15:00.240Z Since, as stated previously, the main value of the char as a clarifying and filtering medium lies in the fact of its porosity, anything which reduces this will greatly impair its efficiency. The Philippine Agricultural Review Vol. VIII, First Quarter, 1915 No. 1 2011-04-13T02:00:12.527Z More recently smaller moulds have been adopted, one mould for each ring, and an annular space for moisture to develop a pressure during vulcanising and prevent porosity. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z It was understood that the mature chick just before its egress from the egg must have air, and the porosity of the egg-shell was sufficient to permit its entrance. Makers of Modern Medicine 2011-03-05T03:00:29.580Z Then we considered factors such as the permeability and porosity of the rock to estimate how long would it take for fluid pressure to decline until no more fluid would come out of the vent. Mud volcano flow to last 26 years 2011-02-25T09:14:10Z Continuous fevers represented for him the effect of the gouty toxin upon the large vessels, while paralyses might occur if the gouty toxin involved the "porosities" of the nerves. The Century of Columbus 2011-01-29T03:00:17.380Z A′erated Bread, bread which receives its sponginess or porosity from carbonic acid supplied artificially, and not produced by the fermentation caused by leaven or yeast. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide They make the visible porosity of such kinds of wood. The Elements of Botany For Beginners and For Schools Their specific gravity varied with their porosity; the most compact attained 2�75.4. The Eruption of Vesuvius in 1872 This membrane possesses a certain degree of porosity, which is probably increased by dilatation. On Snake-Poison: its Action and its Antidote They might note the absence of skin porosity. The Plotters Care must be taken that no crystals appear, which would injure the porosity of the paper. Paper and Printing Recipes A Handy Volume of Practical Recipes, Concerning the Every-Day Business of Stationers, Printers, Binders, and the Kindred Trades The grapes are trodden and the fermentation takes place in jars and chatties of porous earth, of a capacity of 2 or 3 hectolitres, which are tarred inside to counteract their porosity. Notes on Agriculture in Cyprus and Its Products Chalk walls sometimes have youthful vices in the way of porosity that entirely disappear with advancing years through the closing up of the surface pores, which eventually makes a cavity and inner lining superfluous. Cottage Building in Cob, Pisé, Chalk and Clay a Renaissance (2nd edition) Then, too, the work of the earthworms in loosening the soil, and thus adding to its porosity, should not be overlooked. The Apple The more we study and compare, the more readily we understand, that space, duration, size, minuteness, solidity and porosity, are all relative terms which depend for their significance entirely on the standpoint of consciousness. Solaris Farm A Story of the Twentieth Century The extreme porosity of the soil probably also accounts for the length of time it will go on bearing crops without becoming exhausted. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 "Chicago, University of" to "Chiton" The porosity of the clothing is lessened when soiled, and its power of conducting heat from the system in consequence, is increased. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The plate loses its porosity, the particles cementing together and closing the pores in the lead. The Automobile Storage Battery Its Care And Repair The grade of the tile must be properly adjusted to the porosity of the soil; that is, in open, porous, and gravelly soils a grade must be steeper than in loamy and dense soils. Rural Hygiene The humus that will be left in the soil as the vegetable matter decays increases the porosity of the road surface making it more absorbent than soil without humus. American Rural Highways The quantity of sewage disposed of will depend on the character of the soil, its porosity, the time of the year, temperature, intermittency of irrigation, etc. The Home Medical Library, Volume V (of VI) Between the point of entrance and the point of escape from the water table, the water follows various courses, depending upon the porosity and the openings in the rocks. The Economic Aspect of Geology The paste used for the negatives may contain lamp black to give porosity. The Automobile Storage Battery Its Care And Repair As a result of the porosity of the rock, many of the wells feel the influence of the sea and exhibit an ebb and flow. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" The extent to which the water is taken up by the soil will vary with the porosity and slope of the land and the character of the growth thereon. American Rural Highways The water is not at rest, but has a slow and well-defined motion, the rate of which depends upon the porosity of the soil and also upon the inclination or gradient of the water table. The Home Medical Library, Volume V (of VI) The porosity of the rocks, and therefore the flow of an artesian circulation, may in some cases be artificially increased by blasting and shattering. The Economic Aspect of Geology Effect of quantity, arrangement, and porosity of active materials on 42Capacity. The Automobile Storage Battery Its Care And Repair Most engineers, to compensate porosity, would allow twelve to thirteen cubic feet per ton. Principles of Mining Valuation, Organization and Administration The cloth, covering the rolls, must have great strength, sufficient porosity to allow water to pass it freely, and such closeness of texture as to retain the fine particles of peat. Peat and its Uses as Fertilizer and Fuel These characters are dependent principally, though not entirely, on the porosity of the soil. Elements of Agricultural Chemistry With equal porosity the flow is at a maximum along a line directly connecting the two points, and on more devious courses the flow is less. The Economic Aspect of Geology Effect of quantity, porosity, and arrangement of, on capacity 42Active materials. The Automobile Storage Battery Its Care And Repair In such discount must be reflected regard for the porosity of the ore, and the margin of safety necessary may vary from 10 to 25%. Principles of Mining Valuation, Organization and Administration Peat, though having the same or a greater proportion of carbon, is generally inferior to wood on account of its occupying a greater bulk for a given weight, a necessary result of its porosity. Peat and its Uses as Fertilizer and Fuel On the other hand, it diminishes the porosity of light sandy soils, causes them to retain moisture, and generally makes their texture more suitable to the plant. Elements of Agricultural Chemistry Favorable conditions may also be merely differences in porosity of beds in irregular zones, determined by differences either in original deposition or in later cementation. The Economic Aspect of Geology The difference in the composition of the paste for positive and negative plates is for the purpose of securing the properties of porosity and physical condition best suited to each. The Automobile Storage Battery Its Care And Repair The ratio of cubic feet to tons depends on the specific gravity of the ore, its porosity, and moisture. Principles of Mining Valuation, Organization and Administration It holds the water like a sponge, and, according to its greater or less porosity, will retain from 50 to 100 or more per cent. of its weight of liquid, without dripping. Peat and its Uses as Fertilizer and Fuel In virtue of its extreme porosity, a similar power is possessed by charcoal. Fragments of science, V. 1-2 In shales and clays, which are commonly the impervious "cap-rocks," porosity may be equally high, but the pores are too small and discontinuous to permit movement. The Economic Aspect of Geology The spongy lead cements together and loses porosity. The Automobile Storage Battery Its Care And Repair He had been playing a hunch that had seemed as insane, rationally considered, as his wild idea about the bulkhead porosities. The Sky Trap A whale of great porosity And small specific gravity, Dived down with much velocity Beneath the sea's concavity. The Book of Humorous Verse The claim may be made that the efficiency of soft tile is greater than that of the hard tile whose porosity has been destroyed. Crops and Methods for Soil Improvement A certain degree of porosity in the original rock is also known to favor the alteration. The Economic Aspect of Geology If once dried, or subjected to the action of frost, the soil resumes its natural condition of porosity, as will be presently explained. Farm drainage The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with Tiles Some observers base it upon the physical condition of the so-called carbon present, and no doubt this is an important factor, coupled with the porosity. The Handbook of Soap Manufacture It increases the porosity of soils and permits roots to go deeper into the soil for food and moisture. Agriculture for Beginners Revised Edition That there is Empty Space or Void he proves by all the varied motions on land and sea which we behold; by the porosity even of hardest things, as we see in dripping caves. A Short History of Greek Philosophy And with decreasing porosity in the subsoil, there will be decrease in root penetration until it will reach in some instances not more than 3 to 4 feet. Clovers and How to Grow Them The amount of pressure upon the clay in moulding also affects the density and porosity of tiles. Farm drainage The Principles, Processes, and Effects of Draining Land with Stones, Wood, Plows, and Open Ditches, and Especially with Tiles On rich land, which is maintained in this condition of porosity and mellowness, agriculture will produce its best results, and will encounter the fewest possible chances of failure. Draining for Profit, and Draining for Health "The porosity of granite or gold may be equal to that of steam, 29 Cambridge Miscellany, 1842. the greater density being a stronger energy in the central forces." The Destiny of the Soul A Critical History of the Doctrine of a Future Life The quantity of alum requisite to produce the required whiteness and porosity depends entirely upon the genuineness of the flour, and the quality of the grain from which the flour is obtained. A Treatise on Adulterations of Food, and Culinary Poisons Exhibiting the Fraudulent Sophistications of Bread, Beer, Wine, Spiritous Liquors, Tea, Coffee, Cream, Confectionery, Vinegar, Mustard, Pepper, Cheese, Olive Oil, Pickles, and Other Articles Employed in Domestic Economy Tests are also made to determine porosity, permeability, volumetric changes in setting, absorption, coefficient of expansion, effect of oil, etc. Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Federal Investigations of Mine Accidents, Structural Materials and Fuels. Paper No. 1171 Its porosity and smooth-cutting properties render it of great value to painters and polishers for levelling down first coatings. French Polishing and Enamelling A Practical Work of Instruction They are porous, to the extent of absorbing a certain amount of water, but their porosity has nothing to do with their use for drainage,—for this purpose they might as well be of glass. Draining for Profit, and Draining for Health This, of course, depends on the porosity of the material and the friction the water meets in passing through it. Pressure, Resistance, and Stability of Earth American Society of Civil Engineers: Transactions, Paper No. 1174, Volume LXX, December 1910 So in concrete the amount of water necessarily depends, to a great extent, on the porosity or dryness of the stone and other material used. Scientific American Supplement, No. 643, April 28, 1888 The room across the hall is devoted to the study of the specific gravity, absorption, porosity, permeability, hardness, translucency, etc., of burnt-clay products, all the necessary apparatus being provided. Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Federal Investigations of Mine Accidents, Structural Materials and Fuels. Paper No. 1171 By physical character is meant the porosity which results from breaking up the soil. Studies of Trees Water thus deposited on the soil is absorbed more or less completely, in proportion to the porosity of the ground. Draining for Profit, and Draining for Health These will naturally precipitate upon the table or upon the slanting sides of the core, and the mould will therefore present great inequalities as regards porosity. Scientific American Supplement, No. 484, April 11, 1885 Snake-stones, stones popularly believed to cure the bites of snakes, probably due to a porosity in their substance drawing off the poison. The Nuttall Encyclopædia Being a Concise and Comprehensive Dictionary of General Knowledge They are less compact, their density is less, and a thin film of water deposited upon their surface is promptly absorbed, thus indicating a certain amount of porosity. Scientific American Supplement, No. 481, March 21, 1885 An increase in the porosity of the filtering tube is not to be thought of, as this would allow very small germs to pass. Scientific American Supplement, No. 460, October 25, 1884 After this operation it presents the appearance of ordinary sheet lead, but though the physical porosity has disappeared, the chemical porosity is intact, and this alone comes into play in accumulators. Scientific American Supplement, No. 598, June 18, 1887 He derived his name from the remarkable transparency of his deformed members to electric light, due to porosity of the bones and deficiency of the overlying tissues. Anomalies and Curiosities of Medicine The colouring matter is absorbed by the porosity of the stone, but different stones and even different layers in the same stone exhibit great variation in absorptive power. The Project Gutenberg Encyclopedia Volume 1 of 28 A more probable explanation of the occurrence of petrolem in the sandstones is that they have, from their porosity, become convenient receptacles for that which flowed from some organic stratum below. Scientific American Supplement, No. 362, December 9, 1882 If the heating of the animal black exceeds 500° the product hardens, diminishes in volume, and loses its porosity. Scientific American Supplement, No. 288, July 9, 1881 To overcome these defects, the very natural process was adopted of diluting the bleaching-powder, such diluent also serving to increase the porosity of the material. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Silk ranks next to wool in warmth and porosity. A Practical Physiology During my fortnight stay at the Institute I learnt a lot about earthworm environments, including determination of porosity of soil, moisture content and texture. Free from School Does the blood accumulate below the ligature coming through the veins, or through the arteries, or passing by certain hidden porosities? The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) However, the rate of loss of water by direct evaporation from the lower soil layers increases with the porosity of the soil, that is, with the space not filled with soil particles or water. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall There can be no doubt that some of the specimens I examined of this material combined the requirements of extreme hardness, porosity, and sharpness of interior edges around the honeycombed cavities. Cyprus, as I Saw It in 1879 From all this Harvey drew his correct conclusions, declaring earnestly, "By Hercules, there ARE no such porosities, and they cannot be demonstrated." A History of Science — Volume 2 These conditions leave the soil and subsoil of approximately equal porosity. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall Harvey's investigations led him to doubt also the accepted theory that there was a porosity in the septum of tissue that divides the two ventricles of the heart. A History of Science — Volume 2 |
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