* Journa1 Paper No. 640, New York State Experiment Station, Geneva, N. Y., June 9, 1945. This is the fifth in a series of articles on cleaning and sterlizing. For earlier papers in the series, see Food Technology I, 321–344, 1947; N. Y. State Agr. Exp. Station, Tech. Bulletins No. 280–281 and 282.