Home › The Still and Distillation › Description of the Still and Water-Bath (Hole which during)

Description of the Still and Water-Bath (Hole which during)

A hole, which during the operation is kept closed by a screw top, and its use is to introduce fresh liquid into the water-bath without having to disconnect the apparatus. 4th. The cooler or worm, D. This is a long tin pipe, bent in the form of a screw, and enclosed in a copper or wooden vessel full of cold water. The upper part of the pipe, which is often enlarged in a globular form, receives from the beak of the capital the vapors arising from the cucurbit, or water-bath, and the lower portion which opens below the vessel; the condensed liquid flows into a vessel placed underneath.

All the joints of the apparatus are to be luted with bands of paper soaked in paste, except the joint of the cucurbit or water-bath, which must not be tight, in order to allow of the escape of the steam from the boiling water. Tin rests for supporting and fixing the worm gg. in the vessel. h. A vertical pipe fixed to the side of the vessel, open at both ends and terminated at the top by a funnel.

The pipe serves to renew the water in the cooler; cold water is poured in at the top which flows to the bottom of the vessel, and being of a lower specific gravity than the hot water, forces it out at the escape pipe, i. k. A tap, by which all the water in the worm tub can be discharged. f. The end of the connecting pipe between the beak of the capital and the collar of the still. This pipe is of precisely the same height as the collar of the waterbath, m. It is only used in distilling by the waterbath: when a naked fire is used this pipe is dispensed with, in order to avoid raising and lowering the worm. which always remains on the same support, E.