The Principles of Leather Manufacture
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