Date: | 1913 |
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Description: | Class of girls and teacher running a seed germination test ("rag-doll" test) in the classroom. The class is standing around a table, and are using a pail t... |
Date: | 1915 |
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Description: | Teachers and students using a "Babcock Tester" in a classroom. Original caption reads: "Pupils of grammar grades testing milk with Babcock Tester; County S... |
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