Thirty grains of acetic ether, thirty grains grape essence, and thirty grains raisin extract added to the above hop extract are the ingredients of a commercial beer extract.

The hops should not be dried by artificial heat; when air-dry, they may be conveniently reduced to powder by grinding them together with some clean sand in an ordinary drug-mill; when unground they are un-suited for percolation, and so bulky that in preparing the tincture by maceration most of the liquid is absorbed, necessitating the frequent agitation of the mixture and afterwards its forcible expression.