. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. of thisanimal secretion is one of the most remarkable triumphs of modern chemistry. If 10parts of tartaric acid, 14 of black oxyde of manganese, 15 of concentrated sulphuric acid,and from 20 to 30 of water be mixed and distilled in a retort, formic acid will be the liquidproduct; while carbonic acid will be disengaged. It may also be generated from othermixtures. This acid is transparent and colorless, of a pungent sour smell, a stronglyacid taste, of specific gravity ln68 at 60° F.
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. of thisanimal secretion is one of the most remarkable triumphs of modern chemistry. If 10parts of tartaric acid, 14 of black oxyde of manganese, 15 of concentrated sulphuric acid,and from 20 to 30 of water be mixed and distilled in a retort, formic acid will be the liquidproduct; while carbonic acid will be disengaged. It may also be generated from othermixtures. This acid is transparent and colorless, of a pungent sour smell, a stronglyacid taste, of specific gravity ln68 at 60° F., and may be re-distilled without sufferiugany change. It contains in its most concentrated form 19f per cent, of water. Thedry acid, as it exists in the formiates, is composed of 32-54 carbon, 2-68 hydrosen, and64-78 oxygen ; or of two volumes carbonic oxyde gas, and one volume of vapor of reduces the oxydes of mercury and silver to the metallic state. It has not hithertobeen applied to any use in the arts. FORMULiE, CHEMICAL, are symbols representing the different substances, simpleand 518 FORMULiE, CHEMICAL. Name. Formula. Oxygen=100- Hydrogen =1. Oxysfen . • • 0 100-000 16026 Hydrogen H 6-2398 1-000 2H 12-4796 2-000 Nitrogen N 88-518 14-186 2N 177-086 ^8-372 Phosphorus . i P 196-155 31-436 2P 392-310 68-872 Chlorine . • CI 221-3-25 35-470 2C1 442-650 70-940 Iodine . • • I 768-781 123-206 21 1537-562 246-412 Carbon . C 76-437 12-250 2C 152-875 24-500 Boron .... B 135-983 21-793 2B 271-966 43-586 Silicon .... Si 277-478 44-469 Selenium Se 494-582 79-263 Arsenic As 470-042 75-329 2As 940-084 150-659 Chromium Cr 351-819 56-383 2Cr 703-638 112-766 Molybdenum . Mo 598-525 95-920 Tungstenium . Tuor W 1183-200 189-621 Antimony Sb 806-452 129-243 2Sb 1612-904 Tellurium Te 806-452 129-243 Tantalum Ta 1153-715 184-896 2Ta 2307-430 369 792 Titanium Ti 389-092 62-356 Gk)ld (aurum) . Au 1243013 199-207 2Au 2486-026 398-415 Platina Pt 1215-220 194-7
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