| 单词 | helical |
| 例句 | Letting the King’s group have the first go at helical models was the right thing in any circumstance. Double Helix 1968-02-27T00:00:00Z With the B form, however, mere inspection of its X-ray picture gave several of the vital helical parameters. Double Helix 1968-02-27T00:00:00Z Luckily, merely a superficial grasp was needed to see why the TMV X-ray picture suggested a helix with a turn every 2 3 A along the helical axis. Double Helix 1968-02-27T00:00:00Z The sermon was unnecessary, since to her mind there was not a shred of evidence that DNA was helical. Double Helix 1968-02-27T00:00:00Z Seen this way, the structure resembles a spiral staircase with the base pairs forming the steps. helical symmetry, the locations of the atoms in one nucleotide would automatically generate the other positions. Double Helix 1968-02-27T00:00:00Z The following morning I anxiously awaited Francis’ arrival to confirm the helical diagnosis. Double Helix 1968-02-27T00:00:00Z When he saw the blank regions that characterize helical patterns, he jumped into action, quickly spilling out several possible helical TMV structures. Double Helix 1968-02-27T00:00:00Z For months both Max and Bragg had been after him to work out the helical theory, but he had not moved into action. Double Helix 1968-02-27T00:00:00Z This could only mean that the 3.4 A-thick purine and pyrimidine bases were stacked on top of each other in a direction perpendicular to the helical axis. Double Helix 1968-02-27T00:00:00Z From this moment on, I knew I could no longer avoid actually understanding the helical theory. Double Helix 1968-02-27T00:00:00Z Every helical staircase I saw that weekend in Oxford made me more confident that other biological structures would also have helical symmetry. Double Helix 1968-02-27T00:00:00Z The visit would give him the opportunity to tell Dorothy about his success with Bill Cochran in working out the helical diffraction theory. Double Helix 1968-02-27T00:00:00Z Three chains twisted about each other in a way that gave rise to a crystallographic repeat every 28 A along the helical axis. Double Helix 1968-02-27T00:00:00Z Francis ran through the helical theory itself, devoting only a few minutes to our progress with DNA. Double Helix 1968-02-27T00:00:00Z Six weeks of listening to Francis had made me realize that the crux of the matter was whether Rosy’s new X-ray pictures would lend any support for a helical DNA structure. Double Helix 1968-02-27T00:00:00Z My morale automatically went down, until I hit upon a foolproof reason why subunits should be helically arranged. Double Helix 1968-02-27T00:00:00Z Rosy did not give a hoot about the priority of the creation of the helical theory and, as Francis prattled on, she displayed increasing irritation. Double Helix 1968-02-27T00:00:00Z Moreover, even before she learned of our proposal, the X-ray evidence had been forcing her more than she cared to admit toward a helical structure. Double Helix 1968-02-27T00:00:00Z Most important, the simplest way to generate cozy corners was to have the subunits helically arranged. Double Helix 1968-02-27T00:00:00Z With the helical TMV picture now in my pocket, I felt more confident that Delbriick would at last wholeheartedly approve my liking for Cambridge. Double Helix 1968-02-27T00:00:00Z Instead, she became increasingly annoyed with my recurring references to helical structures. Double Helix 1968-02-27T00:00:00Z Coolly she pointed out that not a shred of evidence permitted Linus, or anyone else, to postulate a helical structure for DNA. Double Helix 1968-02-27T00:00:00Z This was particularly true if they were helically stacked. Double Helix 1968-02-27T00:00:00Z With the A form, the argument for a helix was never straightforward, and considerable ambiguity existed as to exactly which type of helical symmetry was present. Double Helix 1968-02-27T00:00:00Z It was tilted at about 2 5 degrees, so that if I were lucky I’d find the helical reflections. Double Helix 1968-02-27T00:00:00Z So if the backbone was on the outside, the crystallographic repeat of 34 A had to represent the distance along the helical axis required for a complete rotation. Double Helix 1968-02-27T00:00:00Z Moreover, the black cross of reflections which dominated the picture could arise only from a helical structure. Double Helix 1968-02-27T00:00:00Z Francis saw no reason to understate the power of the helical theory and within several minutes revealed the way Bessel functions gave neat answers. Double Helix 1968-02-27T00:00:00Z The model would certainly fit with the general locations of the X-ray reflections, for its essential helical parameters had been chosen to fit the seminar facts I had conveyed to Francis. Double Helix 1968-02-27T00:00:00Z Francis would first sum up the advantages of the helical theory. Double Helix 1968-02-27T00:00:00Z Maurice had no suspicion that almost immediately I would get the X-ray pattern needed to prove that TMV was helical. Double Helix 1968-02-27T00:00:00Z Several days after the fiasco with Bragg, the crystallographer V. Vand sent Max a letter containing a theory for the diffraction of X rays by helical molecules. Double Helix 1968-02-27T00:00:00Z Then, on cue, their helical contraptions sank to the ground, revealing Mr. Browne's short-pants suits in Easter-egg plaids, with whale and lobster motifs. On the Runway Blog: Paris Men's: Lanvin and Thom Browne 2012-07-01T22:54:48Z As a kindly tutor leafed through my cobbled-together portfolio, on the wall I noticed a photo of a trapezoidal cabin with a whirly helical thing on top. Roadmap 2050 2010-05-08T23:05:00Z Later work uncovered coils within the gelatinous coils — the helical trace of the polypeptide — and the atomic details of the flattened porphyrin molecule that myoglobin clasps to its bosom. Myoglobin: turd of the century? 2013-04-19T06:29:00Z I was so excited about the prospect of alternating story lines–two parallel journeys to hell, figurative and literal–and I described this Watson-and-Crick vision of a helical structure to you, in great detail. Karen Russell interviews Kent Russell: “I was firmly in the throes of male adolescence’s hurtful apathy” 2015-04-09T04:00:00Z Even the helical structure shown above is a schematic, simplifying our view of the protein fold. Myoglobin: turd of the century? 2013-04-19T06:29:00Z Then, in unison, the helical covers flopped to the ground, revealing Mr. Browne’s familiar short-pants suits, now in Easter-egg plaids, with whale and lobster motifs. Fashion Review: Fashion Review — Spring Men’s Wear Collections in Paris 2012-07-03T20:38:23Z The double-helix structure solved the problem: DNA encodes information in the sequences of base pairs that sit inside the helix, and it replicates this information when the helical strands separate and re-create the matching strand. Rosalind Franklin Deserves a Posthumous Nobel Prize for Co-discovering DNA Structure 2023-09-24T04:00:00Z The study revealed that pterosaurs had spoke-like bones in their necks organized helically, like the spokes on a bicycle wheel. The oldest pterosaur ever was just discovered; it's 107 million years old 2023-06-03T04:00:00Z The researchers found that employing the alternating helical gait motion allowed the worms to seamlessly untangle themselves. 50,000 Worms Tangled Up in a Ball Unravel in an Explosive Burst when a Predator Appears 2023-04-27T04:00:00Z For certain therapeutic applications, a triple helical RNA could be useful, he said. NOT REAL NEWS: A look at what didn’t happen this week 2022-10-07T04:00:00Z Optical activity is due to the asymmetric shape of molecules in the substance, such as being helical. College Physics for AP Courses 2015-08-12T00:00:00Z Rosalind Franklin, Watson and Crick used X-ray diffraction methods to demonstrate the helical nature of DNA, while Rosalind Franklin formulated the double stranded structural model of DNA. Biology for AP Courses 2022-06-09T00:00:00Z Find the amount of work performed by a 50-kg woman ascending a helical staircase with radius 2 m and height 100 m. Calculus, Volume 3 2016-03-30T00:00:00Z This created a figure-eight pattern known as an alternating helical wave. 50,000 Worms Tangled Up in a Ball Unravel in an Explosive Burst when a Predator Appears 2023-04-27T04:00:00Z One of these takes a particularly dramatic helical shape. More than a bridge: Michael Maltzan’s 6th Street Viaduct addresses mistakes of L.A.'s past 2022-06-29T04:00:00Z The tokamak's toroidal coil confines charged particles into a circular path with a helical twist due to the circulating ions themselves. College Physics for AP Courses 2015-08-12T00:00:00Z DNA is a double helical structure in which complementary base pairing occurs. Biology for AP Courses 2022-06-09T00:00:00Z We are rounding the corner of a helical descent into a darkness that appears bleaker with every “surge.” My colleagues and my hospital are in crisis 2022-01-14T05:00:00Z To create accurate mathematical models of the worms’ helical gait, Patil also needed to see how the individual worms moved inside the tangles. 50,000 Worms Tangled Up in a Ball Unravel in an Explosive Burst when a Predator Appears 2023-04-27T04:00:00Z The magnetic field lines force fast-moving electrons into helical paths, causing them to spray out polarized x-rays known as synchrotron radiation. NASA telescope to study how extreme cosmic objects sculpt x-ray light 2021-12-02T05:00:00Z In one method, helical rods are driven into the ground and connected to metal straps affixed to the bottom of the structure. A factory-built home as a means to affordable housing 2021-09-08T04:00:00Z DNA is a double helical structure in which complementary base pairing occurs. Biology for AP Courses 2022-06-09T00:00:00Z Unstable soil at the site meant new soil had to be brought in and steel helical piles had to be installed. Maryland panel OKs funds for newspaper shooting memorial 2021-05-06T04:00:00Z She added that the bones were organized helically, comparing it to the spokes on a bicycle wheel. Bone scans reveal how the largest flying animal to ever live supported its weight 2021-04-15T04:00:00Z It returned a detailed image of a three-part protein with two long helical arms in the middle. ‘The game has changed.’ AI triumphs at solving protein structures 2020-11-30T05:00:00Z Other structures create similar effects: for example, helically arranged cellulose microfibers make marble berries glisten with a shiny, metallic shade of blue. A Butterfly’s Brilliant Blue Wings Lead to Less Toxic Paint 2020-11-13T05:00:00Z Every helical turn in an alpha helix has 3.6 amino acid residues. Biology for AP Courses 2022-06-09T00:00:00Z A particular arrangement of spins, known as a helical spin structure, is shown here. Inductors enter the world of quantum mechanics 2020-10-06T04:00:00Z What is new about this proposal is that it combines a physical cause—cosmic rays—with a chemical property of living molecules—helical structures—to affect the way primitive life evolved. Cosmic Rays and the Handedness of Life 2020-07-22T04:00:00Z At one point, she corrected James Watson’s interpretation of TMV’s helical structure. Rosalind Franklin was so much more than the ‘wronged heroine’ of DNA 2020-07-20T04:00:00Z Datta et al. then filtered the mixture to remove the long helical structures, thus producing a solution that predominantly contained toroids. Simple molecules self-assemble into the links of a nanoscale chain 2020-07-14T04:00:00Z Rosalind Franklin used X-ray diffraction methods to demonstrate the helical nature of DNA, while Watson and Crick formulated the double stranded structural model of DNA. Biology for AP Courses 2022-06-09T00:00:00Z For example, Yokouchi and colleagues discovered that the current-driven dynamics of the helical spin structures are responsible for the large emergent inductance. Inductors enter the world of quantum mechanics 2020-10-06T04:00:00Z We drove to it, and into it, and up through its helical streets, and finally into its central plaza. Tabula Rasa: Volume One 2020-01-06T05:00:00Z They were studying materials that crystallize in a twisted helical pattern. A Nazi Version of DDT Was Forgotten. Could It Help Fight Malaria? 2019-10-17T04:00:00Z Using wet DNA fibres, he took images revealing the black-cross diffraction pattern characteristic of helical molecules. The forgotten scientists who paved the way to the double helix 2019-04-15T04:00:00Z Watson and Crick used X-ray diffraction methods to demonstrate the helical nature of DNA, while Rosalind Franklin formulated the double stranded structural model of DNA. Biology for AP Courses 2022-06-09T00:00:00Z Contrasted with their headlong approach, Franklin’s caution — she won’t say that DNA is a helix, only that it “appears helical” — proves her tragic flaw. Review: She helped discover DNA. History may have forgotten her, but ‘Photograph 51’ does not 2019-03-15T04:00:00Z They had to thread a molecule of methane through a simulated carbon nanotube; unwind a helical molecule and wind it up in the opposite direction; and tie a knot in a simulated protein. It’s Time for a Chemistry Lesson. Put on Your Virtual Reality Goggles. 2018-07-03T04:00:00Z DDT, they found, exhibited the characteristic pinwheel gradients of a helical crystal when illuminated with polarized light. A Nazi Version of DDT Was Forgotten. Could It Help Fight Malaria? 2019-10-17T04:00:00Z Like a coiled spring, a helical structure can support greater loads before breaking compared with simple linear structures, she notes. Core Strength: Extreme "Close Ups" May Help Explain Why Our Bones Are So Strong 2018-05-03T04:00:00Z DNA is a double helical structure in which complementary base pairing occurs. Biology for AP Courses 2022-06-09T00:00:00Z One group of geneticists identified the “narrative potential” of human genomes, suggesting that stories lie in virtually every dark nook of its helical coils. The Future of Science Storytelling 2018-04-30T04:00:00Z The task with the helical molecule took about the same amount of time in both environments, however. It’s Time for a Chemistry Lesson. Put on Your Virtual Reality Goggles. 2018-07-03T04:00:00Z The tRNA model fits the long helical density well. Architecture of an HIV-1 reverse transcriptase initiation complex 2018-04-24T04:00:00Z Inspired by the bone model Kröger and his colleagues propose, developers could begin designing a new generation of stronger, more durable, lightweight building materials reinforced by a helical skeleton within. Core Strength: Extreme "Close Ups" May Help Explain Why Our Bones Are So Strong 2018-05-03T04:00:00Z DNA is a double helical structure in which complementary base pairing occurs. Biology for AP Courses 2022-06-09T00:00:00Z For maximum mobility, a helical body propelled by twirling works best. This robot made of algae can swim through your body—thanks to magnets 2017-11-22T05:00:00Z The contracted sheath was much shorter, slightly fatter, covered by helical ridges, and empty – just as you’d expect from a contractile injection system. Bacteria Stab Amoebas to Escape Being Eaten 2017-10-09T04:00:00Z And though it was largely the work of foreigners—the helical tunnels, for instance, were designed by a German named Robert Gerwig—its success helped give rise to the legend of Swiss precision and engineering. The Long Dig 2008-09-15T04:00:00Z How or why these crystallite needles are helically organized remains an unanswered question. Core Strength: Extreme "Close Ups" May Help Explain Why Our Bones Are So Strong 2018-05-03T04:00:00Z Because of the way the subunits are joined, the glucose chains have a helical structure. Biology for AP Courses 2022-06-09T00:00:00Z Covertly, he continued to work after hours at the Cavendish on the “helical” structure of DNA. The 100 best nonfiction books: No 15 – The Double Helix by James D Watson (1968) 2016-05-09T04:00:00Z Watch for the spin in this video, along with the emergence of helical ridges on the contracting sheath: Bacteria Stab Amoebas to Escape Being Eaten 2017-10-09T04:00:00Z Each artist received a blank slate—a double helical sculpture—on which to craft their answer. Q&A: Francis Crick’s granddaughter on her genomic sculpture 2015-09-24T04:00:00Z The scientists saw mineral crystals just five nanometers in diameter unexpectedly twisting into and around these collagen strands—forming a helical structure. Core Strength: Extreme "Close Ups" May Help Explain Why Our Bones Are So Strong 2018-05-03T04:00:00Z Scanning electron microscope images show helical structures resembling drill-bits and beaded tails, which are characteristic of sperm produced by crayfish worms, leech-like creatures that live on freshwater lobsters. Oldest animal sperm found inside fossilized worm cocoon 2015-07-14T04:00:00Z Deep nesting in a lizard, déjà vu devil’s corkscrews: first helical reptile burrow and deepest vertebrate nest. Goannas Dig the Deepest, Twistiest Burrows Of All 2015-07-06T04:00:00Z Compared to screening with chest x-rays, squamous cell carcinomas and adenocarcinomas were detected more frequently at the earliest stage by low-dose helical CT. Medicare To Cover Low-Dose CT Scanning For Those At High Risk For Lung Cancer 2015-02-16T05:00:00Z Alan Binstock’s “Life Code Prototype,” for instance, straddles biochemistry and anatomy, evoking both spinal vertebrae and the helical structure of DNA. Art review: ‘Gedankenexperiment’ at American Association for the Advancement of Science The register between amino acid sequence and the -helical model was determined based on the connectivity of density and secondary structure prediction. Mechanism of Tc toxin action revealed in molecular detail 2014-04-04T18:24:45.845Z Maxi is a dimer in which two helical monomers each bend in the middle to form a four-helix bundle. [Report] An Antifreeze Protein Folds with an Interior Network of More Than 400 Semi-Clathrate Waters 2014-02-13T19:26:12.020Z The biggest question about these burrows is why the animal construct them in helical fashion. Goannas Dig the Deepest, Twistiest Burrows Of All 2015-07-06T04:00:00Z One of them, Rosalind Franklin, succeeded in taking an X-ray diffraction pattern from a sample of DNA that showed a clearly recognizable cross or helical shape. February 28: The Day Scientists Discovered the Double Helix 2013-02-28T18:45:00.210Z The helical molecule is famously held together by four chemical groups, or nucleobases, which, when arranged in a specific order, carry the genetic instructions needed by a living organism to build and maintain itself. DNA 'perfect for digital storage' 2013-01-23T18:03:09Z Each protomer contributes an intertwined helical pair that bends in a left-handed helical 180° turn over the length of the channel, forming an antiparallel coiled coil in the upper and middle part of the pore. Mechanism of Tc toxin action revealed in molecular detail 2014-04-04T18:24:45.845Z Because of his own work and an early X-ray photo of DNA taken by W. T. Astbury, Wilkins strongly believed that the molecule had a helical structure. Books on Science: ‘The Double Helix’ Review - Twists in the Tale of the Great DNA Discovery 2012-11-12T19:35:27Z These corkscrew V. panoptes burrows are the first helical burrows known for any reptile, and also the deepest nesting excavations produced by any tetrapod. Goannas Dig the Deepest, Twistiest Burrows Of All 2015-07-06T04:00:00Z Franklin's DNA picture experimentally confirmed the correctness of the theoretical double helical model Watson and Crick were developing. February 28: The Day Scientists Discovered the Double Helix 2013-02-28T18:45:00.210Z H. pylori live in the mucus lining of the stomach, and it was thought that the helical shape would it to push through this viscous material more easily. Helical bacteria: the benefits of being twisted 2012-06-09T18:45:00.437Z The scientists began by creating a mathematical model of an awn cell—a rod-shaped structure wrapped in rigid, helical fibers. ScienceShot: Unraveling the Mystery of Self-Planting Seeds 2012-06-06T19:20:17Z They had not yet affixed the sound dampening jacket around the cylinder, so he could see the shiny new helical backbone of the machine. A Noble Betrayal 2012-04-28T19:15:00.450Z It’s also conceivable that helical nest burrows are advantageous as goes drainage during flooding events, since the helical shape increases the burrow’s surface area. Goannas Dig the Deepest, Twistiest Burrows Of All 2015-07-06T04:00:00Z The veterinary hospitals at the University of Wisconsin in Madison and Texas A & M now use TomoTherapy, a linear accelerator mounted on a helical device that circles the animal to deliver radiation from every angle. New Treatments to Save a Pet, but Questions About the Costs 2012-04-06T03:24:15Z CST encompasses one continuous, single strand of wire that is molded into a sinusoidal wave and then wrapped in a helical pattern and laser-fused at certain points, making each stent comparable to a flexible spring. FDA Approves Medtronic's Resolute Drug-Eluting Stent for Treatment of CAD, Including Diabetics 2012-02-17T23:07:18Z Valve springs of the helical coil type are generally used, though torsion or “scissors” springs and laminated or single-leaf springs are also utilized in special applications. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z These helical shapes are handy for encoding data. A High-Bandwidth Interplanetary Connection 2011-07-15T21:31:47Z You'd be able to see how it reads the stream of "bases"—the four types of building blocks strung together in DNA's helical structure—and makes copies. Pacific Biosciences' $600 Million Decoder Ring 2011-04-28T21:00:00Z They contained internal fire-boxes with grates of 20 feet area, and were surrounded by flues helically traversing the masonry setting. A History of the Growth of the Steam-Engine 2011-04-21T02:00:53.240Z They also view animal love as a textbook case of biology and culture operating in helical collusion. The Creature Connection 2011-03-14T17:14:39Z A small helical spur pinion at the other end of this countershaft receives its motion from a larger gear turned by the hand crank. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z It is advised that in all cases the gear wheels should be cut helically. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z Amp�re and Arago then seem to have experimented together and magnetized a steel needle wrapped in paper which was enclosed in a helical wire conveying a current. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The wheels were driven, by means of intermediate gearing, by two steam-engines, which, with their attachments, were suspended on helical springs, to prevent injury by jars and shocks. A History of the Growth of the Steam-Engine 2011-04-21T02:00:53.240Z At higher levels, larger clusters form, eventually self-assembling into chains with an intricate helical structure. Self-Assembling Structures Open Door to New Class of Materials 2011-01-18T17:21:00Z They are stabilized in a helical shape that stays active longer in the body. Roche Backs New Method for Drug Delivery to Cells 2010-08-24T05:00:00Z In earlier work, they showed that DNA doesn’t try to unwind when stretched; it does the opposite, “overwinding” itself by rotating even further in the same direction as its helical winding. Physicists Untangle the Geometry of Rope 2010-04-14T16:24:00Z Relieving a Hob having Spiral Flutes Relieving Hobs or Taps Having Spiral Flutes.—With this attachment, taps or hobs having “spiral” or helical flutes can also be relieved. Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. Two helical blades, 472 which also form part of the mechanism, serve to draw out and aerate the dough, as effectively, it is claimed, as can be done by the most skilled operative. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4 "Bradford, William" to "Brequigny, Louis" Corresponding helical ribs in the guides rotated the rollers as the car moved. Elevator Systems of the Eiffel Tower, 1889 Rick showed him the helical coil at the end of the probe. The Golden Skull Under the helical headpiece that was the antenna this robot seemed to have two eyes—a new feature—but closer examination showed these to be the twin lenses of a stereoscopic motion picture camera. Astounding Stories, March, 1931 A spring was wound spirally--not helically--around the projecting end of the breaker pivot and the end of the spring hookt over the thin finger. The 1893 Duryea Automobile In the Museum of History and Technology A powerful helical spring, turned out of a solid bar of steel, is compressed between the inside end of the piston and the upper end of the butt. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use When the pilot valve opens, the pressure beneath the piston is relieved and it is seated by the helical spring above. Steam Turbines A Book of Instruction for the Adjustment and Operation of the Principal Types of this Class of Prime Movers My hunch says that Mr. Lazada is crooked as a helical coil. The Golden Skull I think he slipped up when he commented on that helical what's-it, then covered his slip by pretending he'd only leafed through the texts and picked up a bit here and there. The Short Life Then he came to the building on which he had parked his 'copter, and left the beltway, entering and riding up to the landing stage on the helical escalator. Null-ABC In fact, the gas-filled tungsten lamp may be thought of as an ordinary lamp with its long filament made into a short helical coil and the bulb filled with nitrogen or argon gas. Artificial Light Its Influence upon Civilization The centrifugal strain due to this is balanced by helical springs. Steam Turbines A Book of Instruction for the Adjustment and Operation of the Principal Types of this Class of Prime Movers At the tip of the probe was the sensing element which looked very much like the Geiger tube of a radiation detector surrounded by a helical coil. The Golden Skull The cylinder is covered with asbestos sheet, and the wire, which is of nickel, and measures altogether from 3 to 4 ohms, is wound helically round this. Scientific American Supplement, No. 711, August 17, 1889 The stirrer, agitated by a water motor, or, better still, a hot-air engine, has a series of helical blades curved to give a thorough mixing to the oil. Nitro-Explosives: A Practical Treatise The system of defense must react like a helical spring.Tenacity of defense. Military Instructors Manual Upon these four rods are helical springs of sufficient strength to hold down, by means of the grippers to which they are connected, the folds of cloth that have just been made. Scientific American Supplement, No. 492, June 6, 1885 The carriage is provided with strong oak buffers, planks, and spring buffers; the drawbars also have helical compression springs of the usual type. Scientific American Supplement, No. 531, March 6, 1886 It consisted of a metallic cylinder having a helical indenting groove cut upon it from end to end. Edison, His Life and Inventions To give the water a rotary motion he had inserted a helical piece of angle iron, and so prevented deposition. Scientific American Supplement, No. 324, March 18, 1882 Here things happen as in a first-class reed, for the helical curve in no way affects the method of structure employed for a rectilinear series of cells. Bramble-Bees and Others Is the half-fluid resin unsuitable for the wide-spanned roofs which would have to be constructed when the diameter of the helical passage exceeded certain limits? Bramble-Bees and Others The carriage is supported on helical springs and solid steel wheels. Scientific American Supplement, No. 531, March 6, 1886 |
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