The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1842 |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
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Δημοφιλή αποσπάσματα
Σελίδα 217 - paper was in part read, entitled, " On the Transparency of the Atmosphere, and the Law of Extinction of the Solar Rays in passing through it." By James D. Forbes, Esq., FRS, Sec. RS Edinb., Professor of Natural Philosophy in the University of Edinburgh. June
Σελίδα 465 - The sheet to be copied is placed smoothly over the mercurial surface, and a sheet or two of soft, clean paper being placed upon it, it is pressed into equal contact with the metal by a piece of glass, or flat board; in this state it is allowed to remain for an hour
Σελίδα 487 - Cinchonia, sulphur-yellow: Morphia, yellow, then bluish, and lastly violet; in this last state the gold is reduced, and the precipitate is insoluble in water, alcohol, the caustic alkalies, and sulphuric, nitric or hydrochloric acids ; it forms with aqua regia a solution which is precipitated by protosulphate of iron
Σελίδα 418 - This battery establishes that gases in combining and acquiring a liquid form evolve sufficient force to decompose a similar liquid and cause it to acquire a gaseous form. This is to my mind the most interesting effect of the battery; it exhibits such a beautiful instance of the correlation of natural forces.
Σελίδα 488 - only be detected by decomposing the meconate of lead with dilute sulphuric acid; Srdly, the variable nature of the liquids with which opium is mixed. The authors have also, as the results of their experiments, arrived at the following conclusions :— 1st By the aid of reagents it is possible to determine the presence of
Σελίδα 463 - 13. All these glasses were placed on the copper and slightly warmed ; red and smoked glasses gave after vaporization, equally distinct images, the orange the next; the others left but faint marks of their forms; polishing with Tripoli and putty powder would not remove the images of the smoked and red glasses.
Σελίδα 38 - If the three pairs of opposite sides of a hexagon inscribed in a conic section be produced to meet, the three points of concourse will be in
Σελίδα 487 - CHLORIDE OF GOLD AS A TEST OF CERTAIN VEGETABLE ALKALIES. MM. Larocque and Thibierge find, that perchloride of gold is a more decisive test of certain vegetable alkalies, than the double chloride of sodium and gold already employed for this purpose. The following are the colours of the precipitates which it produces with the salts of the annexed alkalies dissolved in
Σελίδα 103 - CHALLIS, MA, FRAS, Plumian Professor of Astronomy and Experimental Philosophy in the University of Cambridge*. THE
Σελίδα 466 - singular manner in which vapours disposed themselves on plates of glass and copper, two years since by Dr. Draper, Professor of Chemistry at New York, and about the same time to the calorific powers of the solar spectrum, by Sir John Herschel*, and to the influence of heat artificially applied, by myself