The Theory and Practice of Brewing. E-book. Formato PDF Michael Combrune   -  Forgotten Books, 2017  - 

The defigns of all brewers are 1 To extract the fermen table parts of the malt, in the molt perfeé't manner. 2. To add hops in fuch proportion, as experience teaches them will prefer-ve and meliorate the beer. And, 3. To employ fuch a pro portion of yeafi, as is futficient to obtain a complete fermentation.