Calendar: 1879-1880 Page 320

evening classes 319 Chlorine Bromine and Iodine Commonly called Halogens or Salt-producers-Liquefaction of Gases-Com- pounds with Hsdrogen-Molecules and Atoms-Bleaching -Relative Chemical Activity of these Elements Fluorine -Glass Etching with Hydro-fluoric Acid diads Oxygen -The Atmosphere-Combustion-Allotropy- Ozone and Oxygen-Water in the solid liquid and gaseous states-Specific and Latent Heat-Natural Waters and their Impurities- Of Hydrates Hydrogen Peroxide Oxygen compounds of the Halogens-Oxides Sulphur -Octahedral Prismatic and Plastic varieties- Electro-positive and Electro-negative kinds-Sulphides and Poly sulphides-Sulphurous Acid-Manufacture of Sulphuric Acid-Sulphites and Sulphates Selenium Tellurium triads Nitrogen -Ammonia-Dissociation-Ammonium theory -The crystalline Ammoniates-The Chlorides and Iodides of Nitrogen-The Oxides of Nitrogen-The Nitrogen Acids -Nitrites and Nitrates Phosphorus Arsenic and Antimony -The Hydrides Chlorides Oxides and Sulphides The three Phosphoric Acids The effect of these elements on Alloys Phos- phates Bismuth -Passage from the non-metallic to the metallic elements Boron -Boracic Acid &c tetrads Carbon -Charcoal Graphite and Diamond-Coal Coke Anthracite and Lignite-Absorption of Gases by Charcoal