Calendar: 1871-1872 Page 288

evening classes 28 compound Gases-Atomic theory-Relation between Atoms and Equivalents-Atomic and equivalent notation-Unitary system-Molecular formulae Water from different natural sources-Rain well spring river and sea-water- Chemical cause of hardness in waters- Remedies lor hardness-Incrustations in boilers-Poisoning of waters by lead-Distillation-Compounds of Water with Acids Bases and Salts-Anhydrides and Acids-Crystalliza- tion of Salts from Water-Water of crystallization and of constitution Carbon -Its natural and artificial varieties-Useful ap- plications of Graphite-Absorption of Gases by Charcoal- Decolorising power of Charcoal 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-