Philosophical Transactions of the Royal Society of LondonW. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1842 |
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Veelvoorkomende woorden en zinsdelen
actinometer action ammonia animal appearance artery atmosphere Barometer blood blood-corpuscles blue branches Brientz Cape capillaries capsule cells cent chloride chyle clouds and wind Cloudy-light coils colour contained copper corpuscles cubic inches curve cytoblasts deflector described diameter discs efferent vessels electromotive force Erebus experiments fasciculus Faulhorn fibre filaments Fine-It fluid formula ganglion Grindelwald guaiacum heat injected intensity interlaced spirals Kerguelen Island kidney light lobules London Malpighian bodies Malpighian tufts mass MDCCCXLII mean membrane metallic minute muscle nearly nerves nitric acid Noon nucleus observations obtained Overcast-light oxide P.M. Fine-light clouds palladium paper Philosophical Transactions Plate platinum plexus portion produced Prussian blue quantity rain rays remarkable represented Royal Royal Medals SA.M sal-ammoniac salt seen Ship's head Society solar solution spectrum starlight station structure substance sulphuric acid surface Table temperature termination thickness throughout the day tion uterus vascular tissue weight 1 grain wind throughout yellow
Populaire passages
Pagina 294 - Phillips. — Figures and Descriptions of the Palaeozoic Fossils of Cornwall, Devon, and West Somerset ; observed in the course of the Ordnance Geological Survey of that District. By JOHN PHILLIPS, FRS, FGS, &c.
Pagina 198 - This picture I have found to be susceptible of a very curious transformation, preceded by total obliteration. To effect this it must be washed with solution of proto-nitrate of mercury, which in a little time entirely discharges it. The nitrate being thoroughly washed out and the picture dried, a smooth iron is to be passed over it, somewhat hotter than is used for ironing linen, but not sufficiently so to scorch or injure the paper. The obliterated picture immediately reappears, not blue, but brown....
Pagina 198 - Both phosphorus and arsenic (bodies remarkable for sesqui-combinations) admit isomeric forms in their oxides and acids. But to return from this digression. " If to a mixture of ammonio-citrate of iron and sulphocyanate of potash, a small dose of nitric acid be added, the resulting red liquid, spread on paper, spontaneously whitens in the dark. If more acid be added till the point is attained when the discoloration begins to relax, and the paper when dry retains a considerable degree of...
Pagina 197 - ... of iron, the peculiar red color which that test induces on persalts of the metal is not produced, but it appears at once on adding a drop or two of dilute sulphuric or nitric acid. This circumstance, joined to the perfect neutrality of these salts, and their power, in such neutral solution, of enduring, undecomposed, a boiling heat, contrary to the usual habitudes of the peroxide of iron, together with their singular transformation by the action of light to proto-salts, in apparent opposition...
Pagina 196 - In further development of these most interesting processes Sir John Herschel says: The varieties of cyanotype processes seem to be innumerable, but that which I shall now describe deserves particular notice, not only for its preeminent beauty while in progress, but as illustrating the peculiar power of the ammoniacal and other persalts of iron above mentioned to receive a latent picture, susceptible of development by u great variety of stimuli.
Pagina 191 - Arts. 204 and 209, where no iron is added beyond what exists in the ferrocyanic salts themselves. Nevertheless the following experiments abundantly prove that in several of the changes above described, the immediate action of the solar rays is not exerted on these salts, but on the...
Pagina 177 - ... purpose. Moisture (as already mentioned, especially assisted by heat) destroys them for the most part rapidly, though some (as the colour of the Senecio splendens) resist obstinately. Their destructibility by this agency, however, seems to bear no distinct relation to their photographic properties. This is also the place to observe that the colour of a flower is by no means always, or usually, that which its expressed juice imparts to white paper. In many cases the tints so imparted have no resemblance...
Pagina 134 - On the Structure and Use of the Malpighian Bodies of the Kidney, with Observations on the Circulation through that gland," published in the Philosophical Transactions for 1842.
Pagina 177 - ... crushed to a pulp in a marble mortar, either alone or with addition of alcohol, and the juice expressed by squeezing the pulp in a clean linen or cotton cloth. It was then spread on paper with a flat brush and dried in the air without artificial heat, or, at most, with the gentle warmth which rises in the ascending current of air from an Arnott stove.