Distillation Still: Fire-Pot Still with Worm Tub

The plain pot still of the USDA's 1911 Farmers' Bulletin 429 (Fig. 3): a kettle set in masonry over a fire grate, with a flue round it, a head that leads the vapour through one long pipe to a coiled condensing worm standing in a tub, and a draw-off cock to empty the kettle. Alcohol boils at 173 °F (78 °C), so the first vapour is richer in alcohol than the liquor; repeating the distillation makes it stronger, but not to 90 %. The bulletin gives no sizes, metals or joints; where we chose, the step says so. The picture: the bulletin's Fig. 3.