Philosophical Transactions of the Royal Society of London

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W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1810
 

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Seite 279 - ... observed to be accompanied by the appearance of an effusion of a luminous . fluid upon the surface of the animal, more particularly about the head, which may be received upon the hand, or other bodies brought into contact with the insect at the moment, and these exhibit a phosphoric light for a few seconds afterwards. This fluid, however, I never could discover in the form of moisture, even upon the clearest glass, although examined immediately with the most scrupulous attention by a lens : it...
Seite 95 - The process is a very simple one *. The bitter liquor from the pits is boiled for some hours in the pans, which are used in summer to prepare common salt; and the impurities, which rise to the surface, are removed by skimming. During the evaporation, a portion of common salt separates; and this, as it is too impure for use, is reserved for the purpose of concentrating the brine in summer. The evaporated bitter liquor is then removed into wooden coolers eight feet long, five feet wide, and one foot...
Seite 274 - I have discovered in the common glow worm, on the inner side of the last abdominal ring, two bodies, which to the naked eye appear more minute than the head of the smallest pin. They are lodged in two slight depressions, formed in the shell of the ring, which is at these points particularly transparent. On examining these bodies under the microscope, I found...
Seite 268 - The phenomenon, he says, had never been witnessed before by any of the company on board, although some of the crew had been two or three times round the globe. I consider this account of Mr. Langstaff very interesting and important, as it proves that the diffused light of the sea is produced by an assemblage of minute medusae on the surface of the water.
Seite 240 - ... analogy of chemistry, to suppose the large quantity of oxygen combined with the potassium, which we know has an intense affinity for oxygen, and which, from some experiments, I am inclined to believe, is capable of combining directly with more oxygen than exists in potash than with the oxymuriatic acid, which, as far as is known, has no affinity for that substance.
Seite 282 - Experiment 4. — The luminous substance of a glowworm was exposed to a degree of heat which would have been sufficient to inflame phosphorus, without increasing the brilliancy of its...
Seite 80 - The purging had abated ; his pulse beat 100 in a minute, and was feeble. A large abscess had formed on the outside of the elbow, which was opened, and half a pint of reddish brown matter was discharged with sloughs of cellular membrane floating in it. The lower part of the arm became much smaller, but the upper part continued tense. A poultice was applied to the wound. The lower portion of the arm and the forearm were covered with circular stripes of soap cerate. He was ordered to take the bark,...
Seite 263 - I then put some sea water that had been rendered particularly clear, by repeated filtrations, into a large glass, and having floated in it a fine cloth. on which I had previously collected a number of luminous points, several of them were liberated, and became distinctly visible in their natural element, by placing the glass before a piece of dark coloured paper. They were observed to have a tendency to come to the surface of the water, and after the glass was set by for some time, they were found...
Seite 27 - When tellurium is made the positive surface in water, oxygen is given off; when it is made the negative surface, the voltaic power, being from a battery composed of a number of plates exceeding 300, a purple fluid is seen to separate from it, and diffuse itself through the water ; the water gradually becomes opaque and turbid, and at last deposits a brown powder. The purple fluid is, I find, a solution of a compound of tellurium and hydrogen in water...

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