Calendar: 1893-1894 Page 193

ENGINEERING 189 Sulphur -Its properties occurrence in nature and alio- opic modifications Sulphuretted hydrogen mode of reparation properties and composition of Oxides of ulphur modes of preparation properties and composition Sulphurous acid and the sulphites Sulphuric acid and ae sulphates properties and composition of tests Nitrogen -Its functions in the Atmosphere Determination the proportions of Nitrogen and Oxygen in Air Ammonia -Valuation of Nitrogenized Manures Formation Saltpetre Nitrification Nitric Acid Preparation Uses of Nitric Acid in assaying nd analysis of metallic alloys Preparation of Gun Cotton Mihninate of Mercury Nitroglycerine Nitrobenzol Picric Vcid Nitrates Gunpowder Nitrogen Oxides Phosphorus -Its sources and its allotropic modifications ts hydrides chlorides and oxides Phosphoric acids and he phosphates Hypophosphorous and phosphorous acids Arsenic -Its hydrides chlorides and oxides Arsenious md arsenic acids Arsenites and arsenates Detection of irsenic Boron -Its occurrence and allotropic modifications Boron ri-oxide Boric acid Silicon and silica Silicic acid Silicon hydride silicon luoride Names and formulae of some of the more important ilicates mineral Dialysis Carbon -Diamond and Graphite or Plumbago-their uses jamp Black Charcoal Distillation of Wood Animal Char- oal or Bone-black-its use in Sugar-refining Coal and its rarieties-their applications for Heating and Lighting 'Carbonic Acid Respiration Fermentation Accidents rom 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