Calendar: 1889-1890 Page 189

engineering 189 Ammonia -Valuation of Nitrogenized Manures Formation of Saltpetre Nitrification Nitric Acid Preparation Uses of Nitric Acid in assaying and analysis of metallic alloys Preparation of Gun Cotton Fulminate of Mercury Nitroglycerine Nitrobenzol Picric Acid Nitrates Gunpowder Nitrogen Oxides Phosphorus -Its sources and its allotropic modifications its hydrides chlorides and oxides Phosphoric acids and the phosphates Hypophosphorous and phosphorous acids Arsenic -Its hydrides chlorides and oxides Arsenious and arsenic acids Arsenites and arsenates Detection of arsenic Boron -Its occurrence and allotropic modifications Boron tri-oxide Boric acid Silicon and silica Silicic acid Silicon hydride silicon fluoride Names and formulas of some of the more important silicates mineral Dialysis Carbon -Diamond and Graphite or Plumbago-their uses Lamp Black Charcoal Distillation of Wood Animal Char- coal or Bone-black-its use in Sugar-refining Coal and its varieties-their applications for Heating and Lighting Carbonic Acid Respiration Fermentation Accidents from Carbonic Acid in Wells &c Testing state of Air in Dwelling-rooms Ventilation Soda-water Importance of Carbonic Acid in Agriculture Salts of Carbonic Acid Carbonic Oxide Its value in Metallurgic operations Roasting of Copper-ores Preparation of Carbonic Oxide Oxalic Acid Hydrocarbons -Marsh Gas defiant gas acetylene De- termination of the composition of organic substances Vapour densities Manufacture of Coal-gas Relative values of its constituents Chemical valuation of Gas Explosions in Coal-mines Safety-lamps Illuminating Flames Gas- burners Petroleums and Paraffin ls Use of the Blow- pipe j' 'W