A Dictionary of chemistry and the allied branches of other sciences v. 3, 1882, Volume 3Longmans, Green & Company, 1882 |
Common terms and phrases
according acetate of lead acetic acid action alcoholic solution alkalis alloy ammonia ammonium aqueous solution atomic barium boiling point bromine calcium carbonic anhydride cast iron cent charcoal Chem chloride cold colour colourless compound containing converted cooling copper crystallises crystals decomposed decomposition deposits dilute dissolves distillation ether ethyl evaporated excess ferric chloride ferric oxide ferrous filtered filtrate forms formula furnace gives hippuric acid hydrate hydride hydriodic acid hydrochloric acid hydrogen hydrometer indigo indigo-blue insoluble iodate iodic acid iodide iodine iridium isatin liquid mass melts mercury metallic mixed mixture needles nitrate nitric acid obtained oxalic oxidised oxygen peroxide Pharm phosphorus platinum Pogg potash potassium powder precipitate produced quantity of heat residue salt separated silica silver slag small quantity sodium soluble in water specific gravity specific heat substance sulphate sulphide sulphuric acid sulphydric temperature tube vapour volume washed weight yellow yields zinc
Popular passages
Page 740 - ... of the membrane being in contact with pure water tends to hydrate itself in a higher degree than the inner surface does, the latter surface being supposed to be in contact with a saline solution. When the full hydration of the outer surface extends through the thickness of the membrane and reaches the inner surface, it there receives a check. The degree of hydration is lowered, and water must be given up by the inner layer of the membrane, and it forms the osmose.
Page 131 - ... arising from all the motions of the particles of the gas. From this it follows that the quantity of heat which must be added to a gas of constant volume in order to raise its temperature by a given amount, is constant and independent of the temperature. In other words, the specific heat of a gas referred to a given volume is constant, a result which agrees with the experiments of Regnault, mentioned at p.
Page 547 - temper," are added to every block of tin weighing from 360 to 390 pounds. Antimony is said to harden tin and to preserve a more silvery color, but is little used in pewter. Zinc is employed to cleanse the metal rather than as an ingredient ; some stir the fluid pewter with a thin strip, half zinc and half tin ; others allow a small lump of zinc to float on the surface of the fluid metal whilst they are casting, to lessen the oxidation.
Page 95 - On partially liquefying carbonic acid by pressure alone, and gradually raising at the same time the temperature to 88° Fahr., the surface of demarcation between the liquid and gas became fainter, lost its curvature, and at last disappeared. The space was then occupied by a homogeneous fluid, which exhibited, when the pressure was suddenly diminished or the temperature slightly lowered, a peculiar appearance of moving or flickering striae throughout its entire mass. At temperatures above 88° no...
Page 196 - ... rubbed up in an agate mortar, are introduced by means of a wooden spatula : on agitating or stirring the liquid with the pestle, the whole dissolves completely and without effervescence. The baryta is next precipitated by sulphuric acid, added drop by drop till slightly in excess: the presence of an excess of the acid may be known by the sulphate of barium falling down more quickly than before. 12 grms.
Page 95 - on partially liquefying carbonic acid by pressure alone, and gradually raising at the same time the temperature to 88° F., the surface of demarcation between the liquid and gas became fainter, lost its curvature, and at last disappeared. The space was then occupied by a homogeneous fluid, which exhibited, when the 1 "On the Continuity of the Gaseous and Liquid States of Matter :
Page 443 - Keller); the tincture is diluted with water till it becomes turbid, decolorised by animal charcoal, and filtered ; the greater part of the alcohol is distilled off; and the residue mixed with water is heated in a water-bath, till the whole of the alcohol is driven off, after which the resin is treated for a long time in a waterbath, with frequently-renewed hot water, and at last dried up. The residue may be dissolved in ether and recovered by evaporation. (Spirgatis.) The...
Page 196 - ... the precipitate washed with a little water, and the last wash-water retained for future washings. The filtrate is again mixed, as above, twice with peroxide of barium, and twice with sulphuric acid. The filtration is then repeated, and the process continued in the same way, till 90 or 100 grms.
Page 547 - Other pewters only contain one fifth or one-sixth of lead ; these when cast are white, without gloss and hard ; such are pronounced very good metal, and are but little darker than tin. The French legislature sanctions the employment of 18 per cent, of lead with 82 of tin as quite harmless in vessels for wine and vinegar. The finest pewter, frequently called "tin and temper...
Page 197 - ... receiver of the air-pump : the water then evaporates before the peroxide of hydrogen. The fluid is agitated from time to time. If it should deposit flakes of silica, which give rise to the escape of oxygen gas, it must be decanted off from them by means of a siphon : if it should evolve oxygen — which it will do as soon as it is so far concentrated as to contain about 250 times its volume of oxygen — two or three drops of sulphuric acid must be added to it.