The Popular Science Review: A Quarterly Miscellany of Entertaining and Instructive Articles on Scientific Subjects, Volume 8

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James Samuelson, Henry Lawson, William Sweetland Dallas
Robert Hardwicke, 1869
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Page 356 - Carpenter is in one sense justified in the proposition, that we may be said to be still living in the cretaceous period. The chalk formation has been going on over some part of the North Atlantic seabed, from its first commencement to the present day, in unbroken continuity and unchanged in character.
Page 411 - BIBLE ANIMALS ; being a Description of every Living Creature mentioned in the Scriptures, from the Ape to the Coral.
Page 174 - The POLAR WORLD; a Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. By Dr.
Page 7 - Having remarked how thin a stratum of air is displaced beneath the wings of a bird in rapid flight, it follows that, in order to obtain the necessary length of plane for supporting heavy weights, the surfaces may be superposed, or placed in parallel rows, with an interval between them. A dozen pelicans may fly one above the other without material impediment, as if framed together ; and it is thus shown how two hundredweight may be supported in a transverse distance of only ten feet.
Page 218 - The diameter of the wire was 0462 millimetre ; its specific gravity was 12-38, as determined with care. The wire was twisted into a loop at each end, and the mark made near each loop. The loops were varnished, so as to limit absorption of gas by the wire to the measured length between the two marks. To straighten the wire, one loop was fixed, and the other connected with a string passing over a pulley and loaded with 1-5 kilogramme, a weight sufficient to straighten the wire without occasioning any...
Page 326 - Ilerschel and by M. Pouillet on the direct heat of the sun, it is found that were no heat absorbed by the atmosphere, about 83 foot-pounds per second would fall upon a square foot of surface placed at right angles to the sun's rays.
Page 237 - It has often been maintained on chemical grounds that hydrogen gas is the vapour of a highly volatile metal. The idea forces itself upon the mind that palladium with its occluded hydrogen is simply an alloy of this volatile metal, in which the volatility of the one element is restrained by its union with the other, and which owes its metallic aspect equally to both constituents.
Page 218 - The palladium wire had, in consequence, hydrogen carried to its surface for a period of one and a half hour. A longer exposure was found not to add sensibly to the charge of hydrogen acquired by the wire. The wire was again measured and the increase in length noted. Finally the wire, being dried with a cloth, was divided at the marks, and the charged portion heated in a long narrow glass tube kept vacuous by a Sprengel aspirator. The whole occluded hydrogen was thus collected and measured; its volume...
Page 276 - ... and, speaking out among them, said that he wondered they should commend and take notice of things which were as much owing to fortune as to anything else, and had happened to many other commanders, and, at the same time, should not speak or make mention of that which was the most excellent and greatest thing of all. "For," said he, "no Athenian, through my means, ever wore mourning.
Page 218 - ... kilogramme, a weight sufficient to straighten the wire without occasioning any undue strain. The wire was charged with hydrogen by making it the negative electrode of a small Bunsen's battery consisting of two cells, each of half a litre in capacity. The positive electrode was a thick platinum wire placed side by side with the palladium wire, and extending the whole length of the latter within a tall jar filled with dilute sulphuric acid. The palladium wire had, in consequence, hydrogen carried...

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