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Scientific American, Vol. 23, No. 14 (October 1870) (1870)

leaf 4

An illustration from Scientific American, Vol. 23, No. 14 (October 1870), 1870, leaf 4
ches'in diameter, The cultivator and the harrow are substantially the same— the great pressure of the numerous applications submitted to and about four and a half inches thick, weighing from eighty the latter being an enlargement of the former, and provided them, cannot reach a new case under a… … Last year Mr. Ryf's sales were made at an Curtis never had a patent allowed in six hours after the ap- everage of twenty-two cents, delivered at plication reached the Patent Office, and he never paid to the Oshkosh, going to the Milwaukee market. He has sold it as disks are interchangeable and may…

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