Construction of an economical semi-automatic sample stirrer and thermometer tapper for the cryoscope is described in detail. These accessories save time and permit closer duplication of results on freezing point of milk.

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Author notes

Mr. W. L. Green received the A.B. degree from the University of Kansas in 1936. He has served as medical technologist with the Detroit Department of Health; as chemist for the Detroit Water Board sewage treatment plant; and as milk sanitarian and milk laboratory supervisor for the Lawrence-Douglas County Health Department, Lawrence, Kansas. At present he is acting chief of the Dairy Products Section, Bureau of Laboratories, Indiana State Board of Health.