The Scientific Papers of the Late Thomas Andrews, M.D., F.R.S., Vice President and Professor of Chemistry, Queen's College, Belfast

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Macmillanand Company, 1889 - 514 pages
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Page 293 - On partially liquefying carbonic acid by pressure alone, and gradually raising at the same time the temperature to 88° Fahr., the surface of demarcation between the liquid and gas became fainter, lost its curvature, and at last disappeared. The space was then occupied by a homogeneous fluid, which exhibited, when the pressure was suddenly diminished or the temperature slightly lowered, a peculiar appearance of moving or flickering striae throughout its entire mass. At temperatures above 88° no...
Page 337 - In this process its volume will steadily diminish as the pressure augments, and no sudden diminution of volume, without the application of external pressure, will occur at any stage of it. When the full pressure has been applied, let the temperature be allowed to fall till the carbonic acid has reached the ordinary temperature of the atmosphere.
Page 374 - ... great under 40 atmospheres, as at the pressure of 1 atmosphere. Still more important is the change in the value of the coefficient at different parts of the thermometric scale, the pressure remaining the same. An inspection of the figures will also show that this change of value at different temperatures increases with the pressure. Another interesting question, and one of great importance in reference to the laws of molecular action, is the relation between the elastic forces of a gas at different...
Page 228 - It is not certain that Prout's law may not be true for oxygen, nitrogen and carbon, without it being necessary to assume, as a consequence, that other bodies behave similarly, that is, that their atomic weight must be exactly multiples by whole numbers of the atomic weight of hydrogen. The law is certainly not true of all bodies, but it may be true of certain groups, whose members, in respect to atomic weight, stand in a simple numerical relation to each other. The atomic weights of silicium, cobalt,...
Page 329 - Our knowledge of the conditions under which matter passes abruptly from the gaseous to the liquid, and from the liquid to the solid state, may now be regarded as almost complete.
Page 361 - If we consider ozone to be a compound of oxygen with oxygen, and the contraction to be consequent upon their combination, then if one portion of this combined or contracted oxygen were absorbed by the reagent, the other portion would be set free, and by its liberation might expand to the volume of the whole. Thus, if we suppose three volumes of oxygen to be condensed by their mutual combination into two volumes, then on absorbing one-third of this combined oxygen by mercury, the remaining twothirds...
Page 337 - What is the condition of carbonic acid when it passes, at temperatures above 31°, from the gasous state down to the volume of the liquid, without giving evidence at any part of the process of liquefaction having occurred ? Does it continue in the gaseous state, or does it liquefy, or have we to deal with a new condition of matter...
Page 348 - The artificial base has the same composition as coniine prepared from hemlock. It is a liquid of an amber-yellow colour, having the characteristic odour and nearly all the usual reactions of ordinary coniine. Its physiological properties, so far as they have been examined, agree with those of coniine from hemlock, but the artificial base has not yet been obtained in large quantity, nor perfectly pure. Valuable papers on alizarine have been published by Perkin and Schunk.
Page 27 - Chowringhee, he saw a pariah dog seize a fisherman and bite him. Several people were collected at the spot ; he also approached, when the same dog ran at him, and as he was retreating before him, bit him in the back part of the right leg, about six inches above the...

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