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Scientific American, Vol. 8, No. 50 (1853) (1853)

leaf 3

An illustration from Scientific American, Vol. 8, No. 50 (1853), 1853, leaf 3
rior in every res- taken to secure a patent. invented a contrivance for the purpose of ded with the means of determining what the pect, and can be put up for less than those of = true level is. It has a duplicate top, A E, brick. They are formed of perforated plates hinged tothe angle, A. The other… … firmly, previous to the commencement of the as noticed by us last week is principally de- The annexed engravings are views of an | cate the slope, the difference intervening be- retreat of the needles and the closing of their signed for farmers, especially those who make twixt the level and the…

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