Metallurgic Chymistry. Being a System of Mineralogy in General, and of All the Arts Arising from this Science. To the Great Improvement of Manufactures, and the Most Capital Branches of Trade and Commerce. Theoretical and Practical. In Two Parts. Translated from the Original German of C. E. Gellert, by I. S. With Plates

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T. Becket, Adelphi, Strand, bookseller to their Royal Highnesses the Prince of Wales, Bishop of Osnaburgh, Prince William, and Prince Edward., 1776 - Chemistry - 413 pages

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Page 57 - Ed. 1776.), where the mercury lies in an earth or ftone, as if it were in a dead form ; and has the appearance of a red-brown iron-ftone ; but it is much heavier- than that. It contains from...
Page 361 - Brafs is frequently made by cementing plates of copper with calaminet where the copper imbibes one-fourth princes-metal, tombac, bell-metal, 'white-copper, &c. If the mixture is made of four to fix parts of copper, with one part of zinc, it is called Princess-metal.
Page 195 - ... of the procefs, we are prefented with the following OBSERVATION. Though it is true that this fixed alcaline fait arifes partly from the coals burnt off with it; yet when [it is...
Page 205 - Here the wonder, excited in the preceding obfervation, ceafes at once ; and 'we now find that the fixed alcali, which appears after this operation, actually exifted in the faltpetre, and •was probably added to it, before the procefs commenced.
Page 186 - ... symbols for some substances that are completely insoluble in the substances represented at the head of the column, except that where silver is given as completely insoluble in fixed alkali Gellert adds the note ' yet this but partly in the dry way '. Also in his remarks on the table Gellert says that ' it is a matter of great difficulty, chiefly in the dry way, to ascertain the order in which bodies may be dissolved ; whence it must needs remain liable, here and there, to some objections. Nevertheless...
Page 58 - For as microfcopes magnify no farther than to a certain degree, and as we do not know the ultimate divifibility of mercury, we cannot juftly determine the point of its fluidity, although its...
Page 32 - When broken it looks as if its whole texture was a compound of loofe cubical grains.
Page 59 - ... and earths by fire. This ore has indeed its own regular veins like other minerals...
Page 327 - The hotter the fteel is when tempered^ and the colder the water, the greater hardnefs it will acquire.

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