The Chemistry of the Several Natural and Artificial Heterogeneous Compounds Used in Manufacturing Porcelain, Glass, and Pottery |
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៩ ៩ ៩ Acetate aciduline add test alcali alumine Ammonia Ditto antimony arsenic assay atoms baking barytes base blow-pipe blue boiling Borate borax calcined carbonic acid charcoal chemical chloride clay cobalt colour combinative potency components compound copper crucible crystals cullet dissolve Ditto pr earth elements evaporate dry evolves Fahrenheit filter flame flint fritt fuse glass glaze gold green heat hydrogen Hypo Ditto incandescence indifferent iron lead lime liquid litharge magnesia manganese manufacture metallic mixed muriatic acid nitrate nitric acid Oxalate oxide oxygen peroxide petuntse platinum porcelain Potash Ditto powder pr pr pr precipitate present processes proportions protoxide pure water quantity salt shews silica silver soda sollicits soluble solution specific gravity strontia substances sulphate Sulpho Ditto sulphuretted sulphuric acid supply test 26 tint vessels ware wash yellow zinc ст
Popular passages
Page 464 - Fond, writing on this subject, says, " its excellent workmanship, its solidity, the advantage which it possesses of sustaining the action of fire, its fine glaze impenetrable to acids, the beauty and convenience of its form, and the cheapness of its price, have given rise to a commerce so active and so universal, that in travelling from Paris to Petersburg!!, from Amsterdam to the furthest...
Page 257 - Plaster casts are varnished by a mixture of soap and white wax in boiling water. A quarter of an ounce of soap is dissolved in a pint of water, and an equal quantity of wax afterwards incorporated. The cast is dipped in this liquid, and, after drying a week, is polished by rubbing with soft linen. The surface produced in this manner approaches to the polish of marble. When plaster casts...
Page 465 - ... from Paris to Petersburg!!, from Amsterdam to the furthest part of Sweden, and from Dunkirk to the extremity of the south of France, one is served at every inn upon English ware. Spain, Portugal, and Italy, are supplied with it ; and vessels are loaded with it for the East Indies, the West Indies, and the continent of America.* It is not among the least of Mr.
Page 534 - Commerce is the grand panacea, which, like a beneficent medical discovery, will serve to inoculate with the healthy and saving taste for civilization all the nations of the world. Not a bale of merchandise leaves our shores, but it bears the seeds of intelligence and fruitful thought to the members of some less enlightened community...
Page 512 - ... and heated, emits in the dark a green light), and place it in warm sand for twenty-four hours. Take a piece of glass well cleaned and freed from all grease by means of a lye ; put a border of wax round it, about an inch in height, and cover it all equally over with the above acid. The longer you let it stand so much the better, and at the end of some time the glass will be corroded, and the figures, which have been traced out with sulphur and varnish, will appear as if raised above the plane...
Page 105 - In t lie chemical analysis of metals, the oxyde of lead is generally preferred for the above purpose ; but, in the assays performed by order of government, metallic lead is always used, probably from the facilities which it is supposed to afford for determining the weight of different ingredients by calculation. The lead in the process first becomes oxydated, then yields some of its oxygen to the other imperfect metals, and afterwards becomes vitrified, in conjunction with the other oxydes so formed,...
Page 193 - In comparing the effect of steam heat, with that of smoke flues, different representations have been made by writers on the subject. Mr Tredgold observes that ' he must be a novice in the science of heat, who cannot produce nearly the same effect by the one as by the other, all other circumstances being the same.
Page 460 - ... (cup shaped like a vase). China dishes, bowls, and basins, are used for serving many of the savoury articles of food in ; but it is as common in the privacy of the palace, as well as in the huts of the peasantry, to see many choice things introduced at meals served up in the rude red earthen platter ; many of the delicacies of Asiatic cookery being esteemed more palatable from the earthen flavour of the new vessel in which it is served.
Page 104 - ASSAYING ; a species of chemical analysis, to ascertain the quantity of gold or silver in a metallic alloy. In its more extended meaning, it is used for the determination of the quantity of any metal whatsoever, in composition with any other metal or mineral. The assaying of gold or silver is divided into two operations ; by one of which they are separated from the imperfect metals, or those easily oxydized ; by the second they are separated from the metals which resist oxydation by simple exposure...
Page 278 - ... when delicate, producing a silky lustre. The lustre of hornblende is vitreous, inclining to pearly, upon the faces of cleavage, in the varieties possessing pale colors. Color, various shades of green, often inclining to brown, white, and black, with every intermediate shade ; nearly transparent in some varieties ; in others opaque ; brittle ; hardness about the same with feldspar; specific gravity, 3.00.