Philosophical MagazineTaylor & Francis, 1838 |
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Common terms and phrases
acetate action æther alcohol ammonia animal appears arragonite atmosphere atomic weights atoms axis azote bismuth body boiling calc spar calm carbonate of lime carbonic acid cells cent chemical chloride Cloudy colour common compound containing copper crystalline crystals dicotyledons dissolved distance distilled effect electricity equation experiments fluid force fossil galvanometer genus geological glass grains heat hydrogen inches induction iron layer lime liquid magnetic mass matter means mercury metallic molar monocotyledons nitrate nitric acid observations obtained oil of wine oxide oxygen paper peculiar phænomena phænomenon Phil plane plants plates platina polarized portion potash precipitate present produced Professor proportion quantity rain remarkable salt siphuncle Society soda solution species specific gravity specimen substance sulphate sulphuret sulphuric acid surface temperature theory tion tube tungstic acid uric acid vapour weight wire
Popular passages
Page 82 - ... pure lime, the fine earth lying beneath either the cinders and burnt marl, or the powdered lime, would, by a slow process, be removed and thrown up to the surface. This supposition is not imaginary, for in the field in which cinders had been spread out only half a year before, Mr. Darwin actually saw the castings of the worms heaped on the smaller fragments. Nor is the agency so trivial as it at first might be thought, the great number of Earth-worms (as every one must be aware who has ever dug...
Page 102 - Bradley's discoveries of the aberration of light and the nutation of the earth's axis, the photographic measurement of the heavens, Schwabe's work on the sunspot period, and Mr.
Page 195 - The experiments of Coulomb, from which it appeared that a wire surrounded by shell-lac took exactly the same quantity of electricity from a charged body, as the same body took in air, seemed to the author to be no proof of the truth of the assumption, that, under such variation of the circumstances as he had supposed, no change would occur. Entertaining these doubts...
Page 341 - The question may be stated thus : suppose A an electrified plate of metal suspended in the air, and B and C two exactly similar plates, placed parallel to and on each side of A at equal distances and uninsulated ; A will then induce equally towards B and C. If in this position of the plates some other dielectric than air, as shell-lac, be introduced between A and C, will the induction between them remain the same ? Will the relation of C and B to A be unaltered, notwithstanding the difference of...
Page 340 - ... time. 1188. The apparatus used may be described in general terms as consisting of two metallic spheres of unequal diameter, placed, the smaller within the larger, and concentric with it ; the interval between the two being the space through which the induction was to take place. A section of it is given (Plate I.
Page 195 - ... might interfere with the results, in the method the author adopted for deciding the question of specific inductive capacity, and as time was requisite for this penetration of the charge, its influence on these results was guarded against, by allowing, between the successive operations, as little tuiie as possible for this peculiar action to arise.
Page 83 - In the peaty field, in 15 years, about 3J inches had been well digested. It is probable however that the process is continued, though at a slow rate, to a much greater depth ; for as often as a worm is compelled by dry weather or any other cause to descend deep, it must bring to the surface, when it empties the contents of its body, a few particles of earth. The author...
Page 342 - As the apparatus were known to have equal inductive power when air was in both (1209. 1211.), any differences resulting from the introduction of the shell-lac would show a peculiar action in it, and if unequivocally referable to a specific inductive influence, would establish the point sought to be sustained. I have already referred to the precautions necessary in making the experiments (1199, &c.); and with respect to the error which might be introduced by the...