Calendar: 1889-1890 Page 188

188 ENGINEERING Hydrogen -Diffusion of Gases Balloons Inflammation and Explosion of Gases Combustion Action of the Atmospheric Oxygen upon Non-Metals and Metals Utility of Metals dependent upon their relations to Oxygen Oxides Acids Bases Salts י י יד γ י י י Water -Analysis and Synthesis Electrolysis Determina- tion of the Composition of Water Chemical Relations of Water to other Substances -Slacking of Lime Crystallisation of Metallic Salts Effects of Dry and Moist Air upon Salts Natural Forms of Water -Rain Spring Saline and Mineral Waters Hard and Soft Waters Sea Water Boiler incrus- tations Formation of Calcareous Deposits in Nature Pro- cesses for softening Waters Action of Water upon Lead Organic Matter in Waters how to decide upon the character of Water-supply Purification of Water Distillation Hydrogen Dioxide -Its preparation and properties Ozone Chlorine -Theory of bleaching Hydrochloric Acid Oxides and the following oxy-acids of chlorine viz Hypochlorous chloric and per-chloric acids preparation properties and composition of Composition and preparation of bleaching powder Bromine and hydrobromic and bromic acids 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