A Treatise on Chemistry, Volume 2Macmillan, 1913 |
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Common terms and phrases
alcohol alkali alloy ammonia ammonium anhydrous anorg aqueous atomic weight barium boiling bromide cæsium calcium carbon dioxide Casium caustic potash caustic soda cent Chem chemical chlorate colour colourless compounds Compt contains converted cooling copper crystallises crystals cupric cuprous cyanide decomposed decomposition deposited dilute electrolytic elements employed evaporated formula furnace fused glass gold heated hydrate hydrochloric acid hydroxide insoluble iodide iron isomorphous Journ lime lines liquid liquor lithium magnesium manufacture mass melts mercury metal mineral mixture molecules monoclinic nitrate nitric acid nitrogen obtained occurs oxide oxidised oxygen peroxide phosphate potassium carbonate potassium chloride powder precipitated prepared present prisms pure reaction readily rend rhombic rubidium saturated silicate silver small quantity sodium carbonate sodium chloride soluble in water solution specific gravity spectra spectrum strontium substance sulphate sulphide sulphuretted hydrogen sulphuric acid symmetry temperature vapour whilst yellow yields Zeit zinc
Popular passages
Page 318 - Under these circumstances a vivid action was soon observed to take place. The potash began to fuse at both its points of electrization. There was a violent effervescence at the upper surface; at the lower, or negative surface, there was no liberation of elastic fluid ; but small globules having a high metallic lustre, and being precisely similar in visible characters to quicksilver, appeared, some of which burnt with...
Page 49 - ... 4. The elements which are the most widely diffused have small atomic weights. 5. The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body. 6. We must expect the discovery of many yet unknown elements, for example, elements analogous to aluminium and silicon, whose atomic weight would be between 65 and 75.
Page 93 - As he that taketh away a garment in cold weather, and as vinegar upon nitre, so is he that singeth songs to an heavy heart.
Page 144 - The strontia flame exhibits a great number of red rays well separated from each other by dark intervals, not to mention an orange and a very definite bright blue ray. The lithia exhibits one single red ray.
Page 414 - DETRIMENTAL to the power of the battery : the copper plate is also covered with a coating of metallic copper, which is continually being deposited ; and so perfect is the sheet of copper thus formed, that, on being stripped off, it has the polish, and even a counterpart of every scratch of the plate on which it is deposited.
Page 415 - Petersburg!), has also made a discovery which promises to be of little less importance to the arts. He has found a method — if we understand our informant rightly — of converting any line, however fine, engraved on copper, into a relief, by galvanic process.
Page 48 - The elements, if arranged according to their atomic weights, exhibit an evident periodicity of properties. (2) Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (platinum, iridium, osmium) or which increase regularly (eg potassium, rubidium, caesium).
Page 27 - For compressible flow this becomes: where y is the ratio of the specific heat at constant pressure to that at constant volume...
Page 144 - The other lines may be attributed to the antimony, strontia, &c. which enter into this composition. For instance, the orange ray may be the effect of the strontia, since Mr. Herschel found in the flame of muriate of strontia a ray of that colour. If this opinion should be correct, and applicable to the other definite rays, a glance at the prismatic spectrum of a flame may show it to contain substances which it would otherwise require a laborious chemical analysis to detect.
Page 625 - ... above the horizon. On comparing the visible brightness of these two sources of light, it was found that the brightness of the sun's disc, as measured by the eye, is 524'7 times as great as that of burning magnesium wire when the sun's zenith distance is 67° 22...