Hummel, J. J. (John James), d. 1902 · London : Cassell · leaf 319
c. a is the steam-chamber surround-ing the vat, B the steam-pipe for heating it, J the Chap. Xm.] INDIGO. 305 trammel-net, i the emptying-pipe; d is a fixed bar sup-porting the stirring-screw c and the cone e. The partsdrawn in dotted lines represent the movable portions ofthe stirring arrangement;… … Fig. 83.—Woad Vat. guiding cone E can be readily connected with the screw c.A cheaper but less substantial arrangement is that inwhich the vat is made of wood, and heated internally bya copper steam-pipe forming a spiral half-way up thewalls of the vat. When not in use for dyeing, and toprevent…
Dyes and dyeing
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