The Year-book of Facts in Science and Art

Front Cover
Simpkin, Marshall, and Company, 1845 - Science
0 Reviews
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 122 - ... a subversion of that theory altogether; for if space be an insulator it cannot exist in conducting bodies, and if it be a conductor it cannot exist in insulating bodies. Any ground of reasoning, which tends to such conclusions as these must in itself be false.
Page 124 - What do we know, he asks, of the atom apart from its force ? You imagine a nucleus which may be called a, and surround it by forces which may be called m ; 'to my mind the a or nucleus vanishes, and the substance consists in the powers of m.
Page 230 - ... and allowed to remain till the picture (if anywhere visible) is entirely destroyed, or if faded, till it is judged sufficient from previous experience ; a term which is often marked by the appearance of a feeble positive picture, of a bright yellow hue, on the pale yellow ground of the paper. A long time (several weeks) is often required for this, but heat accelerates the action, and it is often complete in a few hours. In this state the picture is to be very ^thoroughly rinsed and soaked in...
Page 121 - The metal is a conductor; but how can this be, except space be a conductor ? for it is the only continuous part of the metal, and the atoms not only do not touch (by the theory), but as we shall see presently, must be assumed to be a considerable way apart. Space therefore must be a conductor, or else the metals could not conduct, but would be in the situation of the black sealing wax referred to a little while ago.
Page 235 - ... these impressions. Numerous and arduous duties of a public nature have prevented me from investigating the subject as I wished, and I therefore present the facts for others to adopt, as the basis of what promises to be a most interesting course of study and experiment. First...
Page 121 - I cannot doubt but that he who, as a mere philosopher, has most power of penetrating the secrets of nature, and guessing by hypothesis at her mode of working, will also be most careful, for his own safe progress, and that of others, to distinguish that knowledge which consists of assumption, by which I mean theory and hypothesis, from that which is the knowledge of facts and laws...
Page 238 - Phoenicians. 6. Kings of Egypt appear to have been incidentally derived from each of the above nations. 7. The Copts, in part at least, are a mixture of the Caucasian and the Negro, in extremely variable proportions. 8. Negroes were numerous in Egypt, but their social position in ancient times was the same that it now is, that of servants and slaves.
Page 236 - In one instance, a clear and beautiful ruby colour was produced, limited in a welldefined manner to the drapery, while all other parts were green. To succeed well in the first process, viz., that for fixation and the production of the pearly appearance, the impression should be carried as far as possible without solarization, the solution of the hyposulphate of soda should be pure and free from the traces of sulphur, the plate should be carefully washed with distilled water, both before and after...
Page 188 - The second memoir of the series makes known the action of hydrated potass upon the alcohols, and furnishes a new and simple method of procuring the acid equivalent to a given alcohol". Thus...
Page 124 - ... consider it difficult to think of the powers of matter independent of a separate something to be called the matter, but it is certainly far more difficult, and indeed impossible, to think of or imagine that matter independent of the powers. Now the powers we know and recognize in every...

Bibliographic information