| 单词 | electrometer |
| 例句 | Accelerated particles would strike this strip at the end of their spiral journeys, with their final energies to be measured by an electrometer wired to it. Big Science 2015-07-07T00:00:00Z Each is equipped with 21 electrometers, to separate the mobilities and determine the concentrations of positive and negative ions simultaneously. The role of low-volatility organic compounds in initial particle growth in the atmosphere : Nature : Nature Publishing Group 2016-05-24T04:00:00Z Because the instrument includes two mobility analysers operating in parallel, positive and negative spectra are obtained simultaneously, each with 21 electrometers. Ion-induced nucleation of pure biogenic particles : Nature : Nature Publishing Group 2016-05-24T04:00:00Z It was a fitting experiment: cosmic rays were discovered in 1912 when Austrian physicist Victor Hess carried electrometers to about 5,000 metres in a perilous open basket beneath a balloon. Inflatable friends 2013-01-30T18:20:07.583Z Thomson's absolute electrometer is based upon an ingenious modification of the electrical balance of Harris and Volta. Popular scientific lectures 2012-04-24T02:00:17.273Z But it ought to be remembered that a Dolezalek electrometer, with some hundred or more times the sensibility of the bifilar instrument, was only made possible by its predecessor. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z The electrometer remains as indifferent to the solicitations of the tables as does the mariner's compass. Mysterious Psychic Forces An Account of the Author's Investigations in Psychical Research, Together with Those of Other European Savants 2012-03-28T02:00:29.747Z Taking into account the internal diffusion losses, the mobility distribution is then calculated in 28 size bins from the measured electrometer currents. Ion-induced nucleation of pure biogenic particles : Nature : Nature Publishing Group 2016-05-24T04:00:00Z S. Balance electrometer, a kind of balance, with a poised beam, which indicates, by weights suspended from one arm, the mutual attraction of oppositely electrified surfaces. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z The electrometer consisted of a pair of pith-balls; but, though the experiment was several times repeated, they shewed no signs of electrification. Heroes of Science: Physicists 2012-01-17T03:00:17Z Variations of this electrification of the jar were shown225 by an attached attracted-disk electrometer, the principle of which we shall merely indicate. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z It has no effect even upon the electrometer or the magnetic needle; its force is radiating, quite independent of light, but considerably increased by heat. Modern Magic 2012-01-01T03:00:09.557Z The data inversion that converts the measured electrometer currents to particle concentrations is based on model calculations simulating trajectories of particles with different mobilities, and on calibration measurements of the internal losses. Ion-induced nucleation of pure biogenic particles : Nature : Nature Publishing Group 2016-05-24T04:00:00Z The galvanometer, it will be remembered, measures minute currents; the electrometer measures minute pressures, particularly those of small electrically charged bodies. 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 To test the delicacy of the experiment, a charge was given to the globe less than one-sixtieth of that previously given to the hemispheres, and this was readily detected by the electrometer. Heroes of Science: Physicists 2012-01-17T03:00:17Z He insisted with emphasis that a student who found that a quadrant electrometer would not work well should take it to pieces to ascertain what was the matter. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z The same process being repeated, will again double the electricity of this plate, till, from being quite insensible to the most exquisite electrometer, it will become very conspicuous, or even give sparks. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z This subject affords an opportunity of explaining the uses of our thermometer, barometer, ozonometer, and electrometer, which they see us take much interest in. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z The other principal kind of electrometer we owe, as we do the galvanometers, to the wonderful ingenuity of Lord Kelvin. 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 He arranged an electrometer, consisting of an iron needle poised on a pivot, by which to note the action of the magnet. Inventions in the Century 2011-07-20T02:00:14.643Z It was there pointed out that an electrometer is essentially an instrument for measuring differences of electric potential between conductors, by means of effects of electrostatic force. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z To solve these issues, in 1907 he designed his own "dual thread electrometer", which became known as the "Wulf electrometer" and was quickly employed by many researchers performing delicate ionization experiments. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z Last evening Dr. Walker called me to witness his success with the electrometer. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z He could not count all the atoms shot off, so he put the piece of radium at one end of a tube and an electrometer at the other. 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 needle of the electrometer is made to carry a small reflector; and rays from a properly adjusted source of light are thrown by the reflector, through a small opening, upon the photographic paper. A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility 2011-06-19T02:00:15.717Z The quadrant electrometer has now been vastly increased in sensibility by the use of a single quartz fibre as suspension. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z The Wulf electrometer uses, in place of gold leaf, two quartz threads coated with platinum. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z Who else it could be at Court,–that was a thing which he in vain applied one electrometer after another to draw out. Hesperus or Forty-Five Dog-Post-Days Vol. I. A Biography 2011-05-11T02:00:19.453Z In its simplest form the electrometer is called the "electroscope." 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 W. Thomson, of Glasgow, has devised an atmospheric electrometer, which is likely to become eminently successful, in the hands of skilful observers. A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility 2011-06-19T02:00:15.717Z An account has been given in Chapter XI of the series of electrometers which Thomson invented for the measurement of differences of electric potential. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z When accurate quantitative measurements have to be made, an instrument called an electrometer is used. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z Electroscopes and electrometers, therefore, standing in proximity to electrified bodies can be perfectly shielded from influence by enclosing them in cylinders of metal gauze. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z The galvanometer has a near relative, the electrometer, the astounding delicacy of which renders it equally interesting. 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 A vast improvement in this instrument was made by the invention of the quadrant electrometer by Lord Kelvin, which is the most sensitive form of electrometer yet devised. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Thomson described in this paper six species of electrometers of his own devising. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z Essentially an electrometer consists of a light suspended conductor which moves within four fixed quadrants. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z To some electrometers, in order to avoid errors of parallax, a small telescope, with a micrometer wire, has been added; but, with a little practice, we can read accurately without this refinement. The Eruption of Vesuvius in 1872 Precisely as the pressure-gauge measures the pressure of air or gas in some vessel, so the electrometer measures the electrical pressure in a charged body. 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 It may be pointed out that such an arrangement is not merely an arbitrary electrometer, but may become an absolute electrometer within certain rough limits. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The best known of these are his quadrant electrometer and his attracted-disk electrometers. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z The atmospherical instruments were two electrometers, two of Daniel's hygrometers, Leslie's photometer and hygrometer, besides a good supply of mercurial and spirit thermometers of different sizes. Narrative of a Second Expedition to the Shores of the Polar Sea Quickly raising the conductor by pulling the cord, f, the index of the electrometer will describe a more or less large impulsive arc, and, after two oscillations, will stop at the definite arc. The Eruption of Vesuvius in 1872 So the learned Professor called in the aid of the electrometer. 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 Quadrant electrometers have also been designed especially for measuring extremely small potential differences. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The experiments which Thomson made on atmospheric electricity at the old College tower, and by means of portable electrometers in Arran and elsewhere, can only be mentioned. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z I managed to install down at the dock an apparatus known as the capillary electrometer. The Social Gangster I must begin by describing the bifilar electrometer, in order to explain the apparatus which I have named as above, "Apparechio a conduttore mobile." The Eruption of Vesuvius in 1872 And the electrometer was able to detect the presence of those one at a time. 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 In other words, the electrometer nearly obeyed the theoretical law. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The amount of the charge which they carry may be measured by the electrometer. A History of Science, Volume 5(of 5) Aspects Of Recent Science He mounted the spectrometer and fell to work with a will, taking observations through the telescope, adjusting prisms and diffraction gratings, reading electrometers and other apparatus, and stopping to make intricate calculations. Astounding Stories, March, 1931 Her information various, her eye watchful in minutest observation of nature, and her taste a perfect electrometer.’ Recollections of a Tour Made in Scotland A.D. 1803 And since each of these atoms from radium is charged with electricity, each as it emerged operated the electrometer. 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 Symmetrical Electrometers include the dry pile electrometer and Kelvin’s quadrant electrometer. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z An electrometer For measuring speed of a motor? Ontario Teachers' Manuals: Household Management Electrify this cylinder, and present to its superficies a small square of gold-leaf, held to it by an insulating needle of gum lac, and bring this square to an electrometer of great sensibility. Hints towards the formation of a more comprehensive theory of life. Moreover, it does not require correction for electrometer leakage, as generally happens when more elaborate appliances are used. On Laboratory Arts Then came the instruments of precision—the electrometer, the resistance bridge, the ammeter, the voltmeter—all of the utmost value in the science. Electricity for Boys In the last case the instrument is called an absolute electrometer. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Among Sir William's other inventions we may specially mention an electrometer, which has now assumed a very complete form. Western Worthies A Gallery of Biographical and Critical Sketches of West of Scotland Celebrities The electrometer will instantly show an electricity in the gold-leaf, similar to that of the cylinder which had been brought into contact with it. Hints towards the formation of a more comprehensive theory of life. This is easily done in the case of electrometer jars, and so long as the air remains perfectly dry through the action of sulphuric acid or phosphorus pentoxide, the jar will insulate. On Laboratory Arts I opened the switch—and put on the electrometer to see—if we had enough. The Man Who Rocked the Earth Attracted Disk Electrometers.—A form of attracted disk absolute electrometer was devised by A. Volta. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z This machine has been adopted by Sir William Thomson for maintaining the charge in his electrometer. Western Worthies A Gallery of Biographical and Critical Sketches of West of Scotland Celebrities It will be then found that the electrometer will exhibit no signs of electricity whatsoever. Hints towards the formation of a more comprehensive theory of life. Its appearance did not affect the electrometer, nor could we perceive the compass to be disturbed. Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1 The observations were made by means of an electrometer. Scientific American Supplement, No. 633, February 18, 1888 They found from observations that the particular quadrant electrometer they used might be made to follow one or other of three distinct laws. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The spectroscopic reaction which we may use in the course of this separation is a thousand times less sensitive than observation of the activity by means of the electrometer. The New Physics and Its Evolution It was insulated throughout, and diverged a gold leaf electrometer about one third of an inch. Experimental Researches in Electricity, Volume 1 Faint coruscations of the Aurora Borealis appeared one evening, but their presence did not in the least affect the electrometer or the compass. Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1 In respect of many inconveniences which are connected with the use of an electrometer, I have tried the measurements with a very sensitive galvanometer. Scientific American Supplement, No. 633, February 18, 1888 Guided by these experiments, Ayrton, Perry and Sumpner constructed an improved unifilar quadrant electrometer which was not only more sensitive than the White pattern, but fulfilled the theoretical law of working. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Recent experiments with very sensitive electrometers have hitherto, contrary to the expectation generally entertained, yielded only negative results. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 On working the electrical machine, it was possible to open the electrometer leaves about two-thirds of an inch. Experimental Researches in Electricity, Volume 1 The electrometer was frequently tried, by Mr. Fisher, at times when the state of the atmosphere appeared the most favourable, but always without any sensible effect being produced on the gold leaf. Three Voyages for the Discovery of a Northwest Passage from the Atlantic to the Pacific, and Narrative of an Attempt to Reach the North Pole, Volume 2 Its appearance did not affect the electrometer nor could we perceive the compass to be disturbed. The Journey to the Polar Sea While intent upon examining the electrometer, a large globe of fire flashed from the conducting rod, which was insulated, to the head of Richman, and passing through his body, instantly deprived him of life. The Mirror of Literature, Amusement, and Instruction Volume 12, No. 323, July 19, 1828 I here only refer to those of my experiiments in which the three-foot metallic conductor of Saussure's electrometer was neither moved upward nor downward, nor, according to Volta's proposal, armed with burning sponge. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Electrometer.—The measuring instrument I have employed has been the torsion balance electrometer of Coulomb, constructed, generally, according to his directions235, but with certain variations and additions, which I will briefly describe. Experimental Researches in Electricity, Volume 1 His electrometers and electric meters, his sounding apparatus, and his mariners' compass are all well-known and highly valued instruments. The Glories of Ireland Faint coruscations of the Aurora Borealis appeared one evening but their presence did not in the least affect the electrometer or the compass. The Journey to the Polar Sea Atmospheric vapor was condensed upon a vessel coated with tin foil, filled with ice, carefully insulated, and connected with a very sensitive electrometer. Scientific American Supplement, No. 586, March 26, 1887 Electrical Instruments For measuring the ordinary potential gradient we have two self-recording quadrant electrometers. Scott's Last Expedition Volume I The upper end of the glass thread was attached, as in Coulomb's original electrometer, to an index, which had its appropriate graduated circle, upon which the degree of torsion was ultimately to be read off. Experimental Researches in Electricity, Volume 1 At this elevation, the glass, the brimstone, and the Spanish wax were not electrified in a manner to show any signs under friction—at least, I obtained no electricity from the conductors or the electrometer. Wonderful Balloon Ascents He took up an electrometer, a hydrometer, a compass, a thermometer, and a Toricelli barometer, together with bottles of water, in order to collect samples of the air at different heights. A History of Aeronautics There was the Thomson reflecting mirror galvanometer and electrometer, while nearby were the standard cells by which the galvanometers were adjusted and standardized. Edison, His Life and Inventions I constructed various scientific apparatus—a syren, telephones, microphones, an Edison's megaphone, as well as an electrometer, and a machine for covering electric wire with cotton or silk. Men of Invention and Industry So that in fact the gold leaves became, in this manner, as delicate a test of specific inductive action as they are, in Bennet's and Singer's electrometers, of ordinary electrical charge. Experimental Researches in Electricity, Volume 1 It worked very well on the occasion of our departure from the earth, and gave, without the condenser, one degree to the electrometer. Wonderful Balloon Ascents On a shelf set in the bulkhead was a chart, a telephone receiver, speaking tubes, dials with red and black hands, an array of electrometers, pressure gauges. The Cruise of the Dry Dock Prof. G. Forbes gives the following description: The instrument which I call Breguét's telephone is founded upon the instrument which was described by Lipmann, called the capillary electrometer. Scientific American Supplement, No. 447, July 26, 1884 The electrometer used at the Cape was founded upon the principle developed by Sir William Thomson. Scientific American Supplement, No. 433, April 19, 1884 With the thick string the charge passed at once; with the thin string it occupied a sensible time, and with the thread it required two or three seconds before the electrometer fell entirely down. Experimental Researches in Electricity, Volume 1 At our great elevation, the pile gave only five-sixths of a degree to the same electrometer. Wonderful Balloon Ascents A hundred disks of silver and a hundred pieces of zinc are sufficient for him to produce attractions, sparks, the divergency of the electrometer, and electric hail. Paris as It Was and as It Is The call effected, the first operator continued to revolve the machine so that the balls of pith should diverge in the two electrometers. Scientific American Supplement, No. 384, May 12, 1883 The tar and his training have given way to the register, the gauge and the electrometer. Steam, Steel and Electricity We found at Calabozo, in the midst of the Llanos, an electrical machine with large plates, electrophori, batteries, electrometers; an apparatus nearly as complete as our first scientific men in Europe possess. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 In the midst of the mist I made trial of the electrometer of Volta, armed with a smoking match. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The physicist set up his quadrant electrometer after a good deal of trouble, but throughout the winter had to struggle constantly with rime forming on the parts of his apparatus exposed to the outer air. South: the story of Shackleton's 1914-1917 expedition With some form of this simple instrument, or with the more complicated quadrant electrometer, most radio-active measurements have been made. Darwin and Modern Science Being sufficiently habituated to the climate not to fear the effect of tropical rains, we remained on the shore to observe the electrometer. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 We saw flashes of heat-lightning to the south; and the electrometer of Volta constantly displayed, at sunset, positive electricity. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 I immediately tried the atmospherical electricity by the electrometer of Volta. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Yet the electrometer constantly denoted, a little before the lightning, only E., or positive E., and never negative E. Towards the end of the storm the west wind blew very strongly. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 |
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