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 240
Fig. 5. The side-tube of the flask forming the receiver is connected with the pump,and a thermometer is fitted into the neck of the other flask. To prevent bumping a small piece of porous porcelain is put into the liquid. As a good deal of foaming takes place when distilling under reduced… … Fig. 6. Fig. 7. Another form of distilling flask is the Claisen flask (fig. 6). The thermometeris inserted in b, and a tube drawn out to a capillary point is fitted in a by meansof a cork. The open end of this tube outside the flask is fitted with a short pieceof thick-walled rubber tubing carrying…
Dyes and dyeing
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