Rev. Rul. 55-218

The provisions of section 220.379 of the Distilled Spirits Regulations, which require the distiller to test samples of beer immediately prior to distillation, are intended to require such tests on the basis of individual fermenters. The provisions in the instructions on Form 1598, Proprietor's Report of Operations at Registered Distillery, relative to the sampling of beer from fermenters at registered distilleries will be changed to conform to the above requirement when the form is next revised. While the testing of composite samples of beer is not permitted, the alcoholic content of stillage or spent beer may be determined from a composite sample