The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1850 - Physics |
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Common terms and phrases
æther altitude ammonia analysis angle antimony appearance Astronomer Royal atmosphere azimuth barytes Boethius boiler calm carbonic acid cent chloride circuit Cloudy colour comet compound condensation containing copper crystals decomposed dilatation direction disc dissolved distance distorted figure electricity electromotive force equation equivs experiments ferrocyanide force frost gases gave Greenwich Halley's comet heat hydrochloric acid hydrogen inches light lime magnesia magnetic mean mercury metallic meteor miles millims mineral motion nitrate nitric acid nitrogen nitroprusside observed obtained oxide oxygen passed phænomena phænomenon Phil phosphoric acid plane platinum position potash potassium precipitate pressure produced prusside quantity quaternions rain Regnault regular figure remarkable rotation salt seen silver slit snow soda sodium soluble solution steam string substance sulphate sulphurets sulphuric acid surface temperature thermometer tion tube vapour variable velocity vibrations wind wire zinc δὲ καὶ
Popular passages
Page 140 - In comparing the diffusion of salts dissolved in 10 times their weight of water, it was found that isomorphous compounds generally had an equal diffusibility, chloride of potassium corresponding with chloride of ammonium, nitrate of potash with nitrate of ammonia, and sulphate of magnesia with sulphate of zinc. The most remarkable circumstance is that these pairs are " equi-diffusive," not for chemically equivalent quantities, but for equal weights simply.
Page 140 - The low diffusibility of albumen is very remarkable, and the value of this property in retaining the serous fluids within the blood-vessels at once suggests itself. It was further observed, that common salt, sugar, and urea, added to the albumen under diffusion, diffused away from the latter as readily as from their aqueous solutions, leaving the albumen behind in the phial. Urea itself is as highly diffusible as chloride of sodium. In comparing the diffusion of salts dissolved in ten times their...
Page 550 - ... without limitation. A voltaic current produced by the chemical disturbance of the elements of any battery, no matter what its form may be, is capable of producing by induction a magnetic force, this magnetic force beiny always in an exact ratio to the amount of matter (zinc, iron, or otherwise) consumed in the battery.
Page 492 - Some of the largest deviations from the general mean occurred when this movement was very slight. As to the direction of the elliptic revolution, it was, in the majority of instances, indirect, or contrary to that of the motion of the hands of a watch. In only four instances out of twenty-three, was a motion in the contrary direction observed. 28. ON THE PENDULUM EXPERIMENT. By Prof. JD DANA. [ Not received.] 29. THE PENDULUM AT BUNKER-HILL MONUMENT. By Professor EN HOKSFORD.
Page 240 - PM, several persons in the town of Charlotte were astonished, and not a few were exceedingly terrified, by a sudden explosion, followed at short intervals by two other reports, and by a rumbling in the air to the east and south. The sounds were distinct, and continued more than half a minute...
Page 63 - The great difficulty which has been experienced up to the present time in the preparation of sugar, has been owing to the rapidity with which it, when dissolved in water, alters by exposure to the air in hot climates. It must, however, be clear, since the cells of the sugar-cane are themselves full of sugar dissolved in water, and this solution can be kept for a long time in them, without undergoing any alteration at all, that if the same conditions which exist in nature could only be obtained in...
Page 149 - considering,' as he states, ' the problem of smooth and accurate motion as being now much nearer to its solution than it had formerly been, it might be a question whether, supposing a sidereal clock made on these principles to be mounted at the Royal Observatory, it should be used in communicating motion to a solar clock.
Page 557 - Observations on a Remarkable Exudation of Ice from the Stems of Vegetables, and on a Singular Protrusion of Icy Columns from Certain Kinds of Earth during Frosty Weather " (" Proceedings of the American Association for the Advancement of Science," 1850; also, "Philosophical Magazine,
Page 141 - The corresponding salts of soda appeared to fall into a nitrate and sulphate group also, which have the same relation to each other as the potash salts. The relation of the salts of potash to those of soda, in times of equal diff'usibility, appeared to be as the square root of 2 to the square root of 3 ; which gives the relation in density of their diffusion molecules, as 2 to 3. Hydrate of potash and sulphate of magnesia were less fully examined, but the first presented sensibly double the diffusibility...
Page 401 - Chlorine, or oxymuriatic acid, may be formed, by mixing, intimately, eight parts of common salt, and three of the black oxyde of manganese, in powder. This mixture is to be put into a retort ; four parts of sulphuric acid, diluted with an equal weight of water, and afterwards allowed to cool, is to be poured upon the salt and manganese, when the gas will immediately be liberated, and the operation must be quickened, by a moderate heat.