Book 3 — Earthen Mustard Pots Used as Acid Jars

A Bottle Made from an Earthen Mustard Pot to Contain Acid

A small earthen mustard pot of the type shown makes an ideal acid pot for the bench, as it is not only acid-proof but will not upset so easily as the ordinary acid bottle. The large cork, or stopper of soft wood, thoroughly boiled in hot paraffin, is bored for the insertion of another paraffined cork holding the acid-brush handle. If a coat of paraffin is given the handle, it will easily resist the action of the acid and last much longer.