Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 615
er. Since the boiling-point of a liquid is reduced in proportion asthe atmospheric pressure is removed, it is sometimes advantageous to conduct the processof distillation in a par-tial vacuum. This isespecially the case withsome organic substanceswhich have a high boil-ing-point and are de-composed… … hbXt. S91 r, with an air-pump, by which the pressure on the surface of theliquid in the retort may be very greatly reduced. The sameprinciple is applied in the sugar refineries in order to concen-trate syrups at a low temperature (vacuum-pans). (294.) Steam-Bath. — The fact, that the temperature of…
Matter · Heat
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