The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art

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Gould, Kendall, and Lincoln, 1852 - Industrial arts
 

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Page 190 - The flax fibre, soaked in the solution of sub-carbonate of soda, was no sooner immersed in the vessel containing the acidulated water than its character became at once changed from that of a damp, rigid aggregation of flax to a light, expansive mass of cottony texture, increasing in size like leavening dough, or an expanding sponge. This...
Page 392 - The power of the sun, this day, in a cloudless sky, was so great, that Mr. Rae and I were glad to take shelter in the water while the crews were engaged on the portages. The irritability of the human frame is either greater in these northern latitudes, or the sun, notwithstanding its obliquity, acts more powerfully upon it than near the equator ; for I have never felt its direct rays so oppressive within the tropics as I have experienced them to be on some occasions in the high latitudes.
Page 19 - ... substances to the acting medium at certain intervals, or at each successive stroke of the motive engine — the principal supply of caloric being thereby rendered independent of combustion or consumption of fuel. Accordingly, whilst in the steam engine the caloric is constantly wasted by being passed into the condenser, or by being carried off into the atmosphere, in the improved engine, the caloric is employed over and over again, enabling me to dispense with the employment of combustibles,...
Page 160 - Fahr. below zero ; the density is .03573 ; and the atmosphere ceases altogether at a height of 22.35 miles. M. Biot has verified a calculation of Lambert, who found, from the phenomena of twilight, the altitude of the atmosphere to be about eighteen miles. The condition of the higher regions of the atmosphere, according to the hypothesis adopted by Ivory, is very different, and extends to a much greater height. MICROMETRIC APPARATUS. ONE of the most original contributions to the " Great Exhibition,"...
Page 132 - It is in this state that I prefer to employ it. 6. Into the iodide thus prepared and modified the plate is dipped for a few seconds. All these operations may be performed by moderate daylight, avoiding, however, the direct solar rays. 7. A solution is made of nitrate of silver, containing about 70 grains to one ounce of water.
Page 308 - ... recent and trustworthy work the physician can obtain, and it is to be hoped that an English translation will soon appear, though Cobbold's Entozoa is most excellent in its way; and the best English work on the subject. RECENT RESEARCHES ON THE NERVOUS SYSTEM OF THE...
Page 148 - The careful consideration of all the conditions of this fact resulted in ascribing it to the unequal expansion of the sides of the monument, in consequence of unequal exposure to the sun. Upon observing carefully, it was found during clear days that the motion of the ball in the morning was to the westward, at noon to the north-west, and at evening to the east. It was further observed that on days when the sun was obscured by clouds, no motion of the ball on its index-point occurred. It was still...
Page 279 - How much of the poetry or literature of Europe would be intelligible to persons whose ideas had expanded only to the limits of a coral island, — who had never conceived of a surface of land above half a mile in breadth, of a slope higher than a beach, of a change of seasons beyond a variation in the prevalence of rains...
Page 111 - The disturbance of the tension in one part is accompanied instantly by a disturbance of the tension in every other part ; for as the sum of the external powers of a system, unaltered at its origin, is definite and cannot be changed ; so any alteration either of intensity or direction amongst the lines of force at one place, must be accompanied by a corresponding change at every other. So if a mass of soft iron on the east side of a magnet causes a concentration of the lines of force from the magnet...
Page 275 - It is well known that calcareous springs deposit carbonate of lime in crystalline forms. The salt had been held in solution by carbonic acid contained in the water. Upon reaching the surface under less pressure and the influence of a high temperature, its carbonic acid is given up, and with it a precipitate of carbonate of lime takes place.

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