Chapter XXVI Evaporation, Heating and Drying
Theory of evaporation — Boiling point and vapour-pressure — Consumption of heat in evaporation — Heat-units — Mechanical energy of heat — Evaporation by “multiple effect” — Vapour-pressure of atmospheric moisture — Wet and dry bulb thermometers — Heat and air required in leather-drying — Loss of heat by buildings — Quantity of heat given by steam and hot-water pipes — Screw-fans for drying — Centrifugal fans — “Turret” dryer — Downward ventilation — Arrangement of steam-pipes — Hot water pipes PAGE 420