The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1842 |
Índice
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Términos y frases comunes
action æther ammonia analysis antimony appears arsenic atmosphere atomic volume barometer beds benzoic acid boiling cacodyl calculated calm carbonic acid Cetiosaurus chloride Cloudy coal colour compound containing copper crystals cyanide cyanide of potassium decomposed decomposition density deposits Devonian direction dissolved distillation effect electricity equation experiments Fernel filament fluid force formation formula fossils gas explosion heat Hence hippuric acid hydrogen inches iron killas latitude lime limestone Lyell magnetic matter means memoir metal miles mixture motion nearly nitric acid nitrogen observations obtained orcin oxide oxygen paper particles phænomena Phil Philosophical platinum portion potash precipitate produced Professor quantity rocks saccharometer salt sandstone Silurian solution specific specific gravity strata substance sulphate sulphuret sulphuric acid supposed surface temperature theory tion tornado tube vapour velocity vertebræ wind zinc
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Página 591 - ... he adds this most remarkable sentence : — " I think we cannot account for these appearances, unless we call in the aid of ice as well as water, and that they have been worn by being suspended and carried in ice over rocks and earth under water.
Página 142 - January, when in latitude 70° 41' south, and longitude 172° 36', land was discovered at the distance, as it afterwards proved, of nearly 100 miles, directly in the course we were steering, and therefore directly between us and the pole. Although this circumstance was viewed at the time with considerable regret, as being likely to defeat one of the more important objects of the expedition, yet it restored to England the honour of the discovery of the southernmost known land, which had been nobly...
Página 141 - I have the honour to acquaint you, for the information of my Lords Commissioners of the Admiralty, that at 5 o'clock PM on the 6th of August last, in latitude 24° 44...
Página 164 - ... or in other words the force of the current is equal to the sum of the electro-motive forces divided by the sum of the resistances.
Página 558 - In Mr. Miller we have to hail the accession to geological writers of a man highly qualified to advance the science. His work, to a beginner, is worth a thousand didactic treatises.
Página 527 - ... observation has brought within the sphere of our knowledge. When we overleap those limits, and suppose a total change in nature's laws, we embark on the sea of uncertainty, where one conjecture is perhaps as probable as another ; for none of them can have any support, or derive any authority from...
Página 583 - glacier" theory, as extended by its author, in proving too much, may be said to destroy itself. Let it be limited to such effects as are fairly deducible from the Alpine phenomena so clearly described by Agassiz, and we must all admire in it a vera causa of exceeding interest ; but once pass the bounds of legitimate induction from that vera causa, and try to force the many and highly diversified superficial phenomena of the surface of the globe, into direct agreement...
Página 323 - In the author's opinion, the dark longitudinal striae are spaces (probably occupied by a lubricating fluid) between the edges of flat filaments, each filament being composed of two spiral threads, and the dark transverse striae rows of spaces between the curves of these spiral threads. The filament now mentioned, or its edge, seems to correspond to the primitive marked thread or cylinder of Fontana — to the primitive fibre of Valentin and Schwann — to the marked filament of Skey — to the elementary...
Página 322 - A transverse section of such an object is rudely represented by the figure 8. This is also precisely the appearance presented by the minutest filament, generally termed Fibre : and the author particularly refers to the oblique direction of the line separating the apparent segments in the smaller filament, in connexion with the oblique direction of the spaces between the curves of the spiral threads in the larger one. The spiral form, which has heretofore seemed wanting, or nearly so, in animal tissues,...
Página 23 - ... of these exquisite images be destroyed. If, on the other hand, the process be only continued long enough to leave an exact etching of the original design, which can be done to the minutest perfection, the very cleaning of the plate by the printer destroys its beauty ; and, the molecules of the printing ink being larger than the depths of the etchings, an imperfect impression is produced.