The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 241
Fig. 8. corks, however, may be made quite tight by coating them when in position withcollodion. The flask, which should not be of more than 250 c.c. capacity, isbest heated by either a metallic air-bath (iron crucible) or a metal bath. Thelowering of the boiling-point by a reduction of pressure to… … Fig. 9. cannot be carried out, and particularly for the separation of organic frominorganic substances, distillation in a current of steam is resorted to (seePreparation of Aniline). The apparatus used is shown in fig. 10. A large tin is fitted with a two-holed stopper, through which pass a…
Dyes and dyeing
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