6 CONTENTS. 



PAGE 



Artificial Siliceous Stone 37 



Asphalt and Mastic 37 



Steam Cement 38 



III. METALLURGY 39-90 



Preparation of Carbonic Oxide 39 



1. Ptrometalltjegy 40 



Iron 40 



Waste Gases of Blast Furnaces 40 



Arsenic and Vanadium in Iron-ores 41 



Alkalimetric Test for Iron-ores 41 



Limit of Carbon in Cast, Steel, and Bar-iron 42 



Reduction of Iron-ores in Retorts 42 



Bar-iron from Cast-iron 43 



Steel " " 44 



Steel from Bar-iron 45 



Copper 4o 



Alkalimetric Test for Copper 46 



Reduction of Copper-ores 47 



Lead 49 



Alkalimetric Test for Lead 49 



Tin 50 



Zinc, Mercury and Arsenic 51 



Antimony and Bismuth 53 



Silver and Gold 53 



Reduction of Chloride of Silver 55 



Parting Gold and Silver 56 



Production of Gold 59 



Toughening Gold 60 



Flatinoid Metals 61 



Nickel and Cobalt 62 



Alloys 62-68 



Table of Bronzes 63 



German Silver 61 



Soldering 69 



2. Hydrometallurgy 69 



Plating by Gold and Silver 71 



Galvanic Gilding and Silvering '. 75 



Platinizing and Coppering 79 



Bronzing 82 



Etching 84 



Photography 85 



IV. CHEMICS 91-126 



1. Salines 91 



Water and Solution 91 



Sulphur and Sulphuric Acid 9-1 



Common Salt, Soda-ash, and Chloride of Lime 97 



