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Transparency, Lantern Slide. Handwritten label on slide states: "Diary Utensils: 10 bottle Babcock Tester. Hand size." Slide is from the Cornell University, Dept. of Dairy Industry and was part of an educational slide show. Image shows the Babcock Tester, various styles of bottles, a small beaker, a bottle brush, a cup and a pitcher. The Babcock Tester was used to test milk fat content (?).
film size 3 1/4" x 4"