The Indians could not undertake any widespread cultivation of the plains not only because they lacked iron tools but also because they had no draft animals.
animal cultivation draft
Ellsworth Huntington
These are some quotes by No-nationality author Ellsworth Huntington Educator, who lived between 1876 and 1947.
Quotes by Ellsworth Huntington
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It's funny because you know the novel process: you get the drafts, you get the galley, and then you get the galley proofs. You have opportunities to change things all along. But the further along in the process you go, the more careful you have to be in making those changes, and the smaller the changes have to be.