. Commercium philosophico-technicum; or, The philosophical commerce of arts: designed as an attempt to improve arts, trades, and manufactures . ple, convenient, or effediual. Inthe prefent volume I have given an entire effay on the im-provement of the machines for blowing air into largefurnaces, &c. by a fall of water, without moveable bellows,in virtue of the water carrying down air with it in fallingthrough pipes ; and I have the pleafure of being Informed,by a foreign correfpondent, of a machine which he hasconftrudled on the principles there eflabliflied, which an-fwers as well as can be d
. Commercium philosophico-technicum; or, The philosophical commerce of arts: designed as an attempt to improve arts, trades, and manufactures . ple, convenient, or effediual. Inthe prefent volume I have given an entire effay on the im-provement of the machines for blowing air into largefurnaces, &c. by a fall of water, without moveable bellows,in virtue of the water carrying down air with it in fallingthrough pipes ; and I have the pleafure of being Informed,by a foreign correfpondent, of a machine which he hasconftrudled on the principles there eflabliflied, which an-fwers as well as can be defired. It would be needlefs to fpecify in this place the feveralmatters contained in the volume ; a lift of them may be ften xviii PREFACE. feen in the table of contents. It is fufficient here to haveexplained the principles, and the views, with which theauthor has engaged in the work. How far thefe principlesand thefe views have a jull: foundation, or may tend to theadvancement of arts and ufeful knowledge, and whetherthis laborious and expenfive undertaking fliall be dropt orprofecuted, is left to the determination of the THE THE CONTENTS. J- Page r^ESCRIPTlO N of a portable furnace for making?*-^ experiments i II. Hijlory of gold, and of the various arts and btfmejjes depending L Of the colour of gold, and the methods of rejloring its lujlre tvhen fuUicd og Sedl. II. Of the gravity of gold — 41 Seft. III. Of the duSlility of gold, and the arts depending onthis property ? ? ^a 1. Preparation of gold leaf • j. r 2. Preparation of gold or gilt ivire r i 3. The degree ofextenjion of gold in wire and leaf^ 9 4. Application ofgoldivire and leaf on other bodicsb iSeft. IV. Of the effects of fire on gold 66 1. Of the melting of gold ? 65 2. Of the alterations faid to be producible in goldby fire 70 Sedl. V. Of the mixture of gold with other metals 74 1. Of the mixture of gold with mercury : goldpowder, water gilding, ^c. y r 2. Of the mixture of gold wi
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Keywords: ., bookauthorlewiswilliam17081781, bookidcommerciumph, bookyear1763
