Calendar: 1870-1871 Page 290

EVENING CLASSES 289 Coal -Its origin varieties and their special uses -De- structive distillation of Coal-Prevention and consumption of smoke Carbonic Acid -Chemistry of respiration fermentation putrefaction and decay-Fundamental principles of Ven- tilation-Separation of Carbonic Acid from other Gases- Elementary organic analysis-The Carbonates Carbonic Oxide -Its production in ordinary fires-Its importance in metallurgic operations Compounds of Carbon and Hydrogen -Acetylene- Olefiant Gas-Marsh Gas-Fire-damp of Mines-Safety- lamps-Structure of luminous flames-Influence exerted upon the illuminating power by the composition of the fuel the supply of air and atmospheric pressure-Conditions of maximum temperature in flames-The Blowpipe-Com- position of Coal-gas Silicon -Occurrence in Nature as Silicic Acid and Silicates -Soluble and insoluble Silica-Separation of substances by Dialysis Boron -Borax and Boracic Acid Nitrogen -Its chemical inactivity in the free state Ammonia -Its sources preparation and properties- Liquefaction of Gases-The Salts of Ammonia-Ammonium theory-Determination of Nitrogen in organic compounds- Deduction of empirical and rational formulae-Oxidation of Ammonia Compounds of Nitrogen and Oxygen -Nitric Acid- Manufacture from Saltpetre-Its oxidising properties- Action upon metals and organic substances-The Nitrates- Nitric Anhydride-Derivation of the other Oxides of Nitrogen from Nitric Acid-The Oxides of Nitrogen as illustrating com- biuation in multiple proportions by weight and volume Chlorine -Extraction of Chlorine from Salt-Its great chemical activity-Application of Chlorine for Bleaching and Disinfecting τ