The American Journal of Science, Volumes 163-164J.D. & E.S. Dana, 1902 - Science |
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Results 1-5 of 64
Page 2
... magnetic per- meability , R its resistance to steady currents and p = 2πn , where n is the frequency . In 1890 Stefan , in a paper on electric oscillations in straight conductors , also obtained formulas for the resistance and self ...
... magnetic per- meability , R its resistance to steady currents and p = 2πn , where n is the frequency . In 1890 Stefan , in a paper on electric oscillations in straight conductors , also obtained formulas for the resistance and self ...
Page 10
... magnetic detector devised by Rutherford and described by him in 1896. A few inches of iron wire 0.14mm in diameter were dipped in melted paraffine and , after cooling , the wire was cut into about 20 pieces . Holding these together ...
... magnetic detector devised by Rutherford and described by him in 1896. A few inches of iron wire 0.14mm in diameter were dipped in melted paraffine and , after cooling , the wire was cut into about 20 pieces . Holding these together ...
Page 11
... magnet . The diffusion of the magnetic force from the dielectric into a magnetizable substance is , indeed , similar to the passage of electrical action into a conductor . Hence for rapidly alter- nating currents the magnetic action is ...
... magnet . The diffusion of the magnetic force from the dielectric into a magnetizable substance is , indeed , similar to the passage of electrical action into a conductor . Hence for rapidly alter- nating currents the magnetic action is ...
Page 12
... magnetic detector is one of the easiest to manage and possibly the simplest for quantitative comparisons , though I know of few investigations in which it has been used . Its sensitiveness increases as the wings are lengthened , and the ...
... magnetic detector is one of the easiest to manage and possibly the simplest for quantitative comparisons , though I know of few investigations in which it has been used . Its sensitiveness increases as the wings are lengthened , and the ...
Page 16
... decisive experiments might be made , as the " skin " for carbon is comparatively thick , but such was not available . The magnetic nature of the iron made no difference what- 16 Chant - Experimental Investigation into the.
... decisive experiments might be made , as the " skin " for carbon is comparatively thick , but such was not available . The magnetic nature of the iron made no difference what- 16 Chant - Experimental Investigation into the.
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Common terms and phrases
alba alcohol ammonium ammonium chloride amount angles appears Archelon atolls axis Betula boric acid carbon cent character Chem chloride circle cm³ color copper crater Creodonts Cretaceous crystals curves cusp deposits described determined diameter dike dioxide distance dumortierite effect electric eruption evidence experiments fauna feet feldspar figure formation fossil gases Geol Geological heat hydrochloric acid hydrogen indicated iodide iodine iron jarosite JOUR ledges length liquid magnetic Maldives mass material measured metal method miles mineral molar molecules nuclei observed obtained original oxide Patriofelis Pelée pinnules plane plates position potassium potassium carbonate precipitate premolar present pressure probably protractor quartz radius Regel region residue river rock salt scale SCI.-FOURTH SERIES shown side soluble solution species specimens starch stars stereographic projection sulphocyanide sulphuric surface temperature terrace tion tube valley vapor velocity wire yttrialite
Popular passages
Page 307 - ... degrees of the zero ; but even a second hypothetical substance, again exceeding the first one in volatility to an equal extent, would not suffice to bring him quite to the point of his ambition. That the zero will ever be reached by man is extremely improbable. A thermometer introduced into regions outside the uttermost confines of the earth's atmosphere might approach the absolute zero, provided that its parts were highly transparent to all kinds of radiation, otherwise it would be affected...
Page 306 - ... that of water. Such cold involves the solidification of every gaseous substance but one that is at present definitely known to the chemist, and so liquid hydrogen introduces the investigator to a world of solid bodies.
Page 309 - A specimen of this gas was subjected by Olszewski to liquid air temperatures, combined with compression and subsequent expansion, following the Cailletet method, and resulted in his being unable to discover any appearance of liquefaction, even in the form of mist. His experiments led him to infer that the boiling point of the substance is probably below !)° absolute.
Page 308 - But supposing all difficulties to be overcome, and the experimenter to be able to reach within a few degrees of the zero, it is by no means certain that he would find the near approach of the death of matter sometimes pictured. Any forecast of the phenomena that would be seen must be 'based on the assumption that there is continuity between the processes studied at attainable temperetures and those which take place at still lower ones.
Page 229 - It is interesting to note the phases of petrography through which the work of the Geological Exploration of the Fortieth Parallel passed, since this was the first of the larger surveys in this country that took a deep interest in the petrography of eruptive rocks. It began with King's interest in...
Page 307 - Another important application of liquid air, liquid hydrogen, etc., is as analytic agents. Thus, if a gaseous mixture be cooled by means of liquid oxygen only those constituents will be left in the gaseous state which are less condensable than oxygen. Similarly, if this gaseous residue be in its turn cooled in liquid hydrogen a still further separation will be effected, everything that is less volatile than hydrogen being condensed to a liquid or solid. By proceeding in this fashion it has been found...
Page 306 - ... gaseous substance but one that is at present definitely known to the chemist, and so liquid hydrogen introduces the investigator to a world of solid bodies. The contrast between this refrigerating substance and' liquid air is most remarkable. On the removal of the loose plug of cotton wool used to cover the mouth of the vacuum vessel in which it is stored, the action is followed by a miniature snowstorm of solid air, formed by the freezing of the atmosphere at the point where it comes into contact...
Page 145 - The composition of yttrialite, with a criticism of the formula assigned to thalenite. Am. Jour. Sci., 4th ser., vol. 13, pp. 145-152, 1902. Discusses Benedicks' formula for thalenite and presents the author's results of the chemical properties of yttrialite.
Page 67 - In one sense the conditions of life may be said, not only to cause variability, either directly or indirectly, but likewise to include natural selection ; for the conditions determine whether this or that variety shall survive.
Page 309 - ... it possesses high conductivity. It. may safely be predicted that liquid hydrogen will be the means by which many obscure problems of physics and chemistry will ultimately be solved, so that the liquefaction of the last of the old permanent gases is as pregnant now with future consequences of great scientific moment as was the liquefaction of chlorine in the early years of the last century. The next step...