Handbook of Nature Study

Handbook of Nature Study

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Provides lessons on many topics of nature study, with questions that may form the basis for student projects.The milch cow is a milk-making machine, and the more fuel (food) she can use, the greater her production. Cornell Ollie ... However, if a farmer is producing milk it pays him well to get the best possible machine to make it, and that is alwaysanbsp;...

Title:Handbook of Nature Study
Author:Anna Botsford Comstock
Publisher:Cornell University Press - 1939


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