Take a clear piece of chamois skin, free from thin places; cut it of the desired length; wash it in a weak solution of sal soda or any alkali, to remove the grease, and rinse thoroughly in cold water before using. Tinctures, extracts, elixirs, syrups, and even mucilages are, says a writer in the Druggists' Circular, filtered rapidly. A pint of the thickest syrup will run through in four or five minutes. By washing thoroughly after each time of using, it will last a long time.

Fig. 380. - ascending Filtration Arrangement.

Fig. 381. - Warner's Filter for Upward Filtration.