The synthetic dyestuffs : and the intermediate products from which they are derived (1905)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872-1940 · London : C. Griffen and Co. · leaf 207
Fig. 6. … Fig. 9. Another form of distilling flask is the Claisen flask (rig. 7). The thermometeris inserted in b, and a tube drawn out to a capillary point is fitted in a by means THE TECHNICAL LABORATORY. 189 of a cork. The open end of this tube outside the flask is fitted with a short pieceof thick-walled…
Dyes and dyeing
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