A Dictionary of chemistry and the allied branches of other sciences v. 2, 1882, Band 2Longmans, Green & Company, 1882 |
Häufige Begriffe und Wortgruppen
according acetic acid action alkalis ammonia ammonium aqueous solution atoms barium battery blue boiling bromide calcium carbonic anhydride cent charcoal Chem chloride of cyanogen colour colourless compound conductor containing converted cooling copper crystallises crystals cupric cupric oxide cuprous cyanate cyanic acid cyanide cyanide of potassium cyanogen cyanuric decomposed decomposition deposits dilute dissolves distillation electricity ether ethylamine ethylene evaporated excess exhibits faces ferric ferrocyanide ferrocyanide of potassium forms formula heated hydrate hydrochloric acid hydrocyanic acid hydrogen insoluble iodide of ethyl iron likewise liquid mass melts mercury metallic mixed mixture needles nitrate nitric acid nitrogen obtained odour oxalic oxide oxygen passing Pharm Phys platinum Pogg potash potassium precipitate prisms produced radicle reaction residue resin salt separated silver small quantity sodium soluble in water specific gravity substance sulphate sulphide sulphuric acid sulphydric surface temperature triethylamine tube vapour wire yellow yields zinc
Beliebte Passagen
Seite 314 - The weight, and consequently the value of diamonds, is estimated in carats, one of which is equal to four grains, and the price of one diamond, compared to that of another of equal colour, transparency, purity, form, &c.
Seite 346 - The first, to render the stuff or material to be dyed as clear, as possible, in order that the aqueous fluid to be afterward applied may be imbibed, and its contents adhere to the minute internal surfaces.
Seite 327 - If the drops are so shallow that the liquid dries round the rhombohedrons before they are disturbed, they will remain for weeks without disintegrating, and bear gentle pressure with foreign bodies without alteration ; but stronger pressure, or scratching, or the mere contact of a prismatic crystal of saltpetre, causes them to change...
Seite 341 - DUCTILITY. That property or texture of bodies, which renders it practicable to draw them out in length, while their thickness is diminished, without any actual fracture of their parts. This term is almost exclusively applied to metals.
Seite 308 - Laevotartaric acid forms anhydrous crystals, the aqueous solution of which turns the plane of polarisation of a luminous ray to the left, the rotation being equal and opposite to that produced by dextrotartaric acid.
Seite 386 - In rarefied oxygen, the form and appearance are better, the colour somewhat purplish, but all the characters very poor compared to those in air. 1458. Nitrogen gives brushes with great facility at the positive surface, far beyond any other gas I have tried : they are almost always fine in form, light, and colour, and in rarefied nitrogen are magnificent. They surpass the discharges in any other gas as to the quantity of light evolved.
Seite 54 - Parkes, a solution of cyanide of potassium is slowly added to a blue ammoniacal solution of copper, when the latter gradually loses its colour, and finally becomes quite colourless ; upon this chemical reaction the estimation of copper by cyanide of potassium depends. By ascertaining by direct experiment the amount of cyanide of potassium solution required to discharge the colour in an ammoniacal...
Seite 40 - The alloy of 11 pts. copper to 1 tin appears uniform after sudden cooling, to the unassisted sight; but when examined with a lens, it appears to be composed of striated faces of a reddish alloy mixed with a white one. If it be still more rapidly solidified by pouring it into thick iron moulds, an alloy is obtained which appears perfectly uniform, even under the lens. When quickly cooled in water after continued strong ignition, it remains uniform ; but if suffered to cool slowly after continued ignition,...
Seite 313 - It becomes phosphorescent on exposure to the sun or the electric spark, and shines with a fiery light In its power of refracting light it is exceeded only by red lead ore, and orpiment Its index of refraction is 2'439. It reflects all the light falling on its posterior surface at an angle of incidence greater than 24° 13', whence its great lustre is derived.
Seite 470 - ... obtained, passing from the transverse section through the nerve to the touched point of the lateral surface. Generally, the nervous current is subject to the same laws as the muscular current ; the nerves may therefore be supposed to be the seat of a number of closed molecular currents, of which the currents actually indicated by the multiplier are merely derived portions, greatly inferior in strength to the nervous currents themselves. When an electric current from a voltaic couple is passed...