Calendar: 1890-1891 Page 191

ENGINEERING 187 Iodine and hydriodic iodic and periodic acids Iodides Fluorine -Hydrofluoric acid Etching on glass Sulphur -Its properties occurrence in nature and alio- tropic modifications Sulphuretted hydrogen mode of preparation properties and composition of Oxides of sulphur modes of preparation properties and composition of Sulphurous acid and the sulphites Sulphuric acid and the sulphates properties and composition of tests Nitrogen Its functions in the Atmosphere Determination of the proportions of Nitrogen and Oxygen in Air 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 formulae 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 ill 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