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. Griffin and company, limited · leaf 207
some cases it is necessarj- to superheat the steam before passing it intothe flask (e.g. in the distillation of a-naphthylamine). This is done by passingthe steam through a copper coil heated by a large burner. Filtration.—Most of the tiltering in a technical laboratory is done withthe use of a… … The filter-paper used is that specially made for the purpose, which can beobtained in sizes suitable for anj porcelain funnel (Schleicher and SchiillsNo. 59.) hardened til tor-paper). Before use, it is moistened with water and fittedill the funnel with the pump working, in order that any crevices…
Dyes and dyeing
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