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Appendix to the specifications of english patents for reaping machines (1853)
Woodcroft, Bennet · published under the sanction of the commissioners of patents, by George Edward Eyre and William Spottiswoode · leaf 168
A . D . I839 , August 9 . AUSTRIAN PATENT . SPRINGER ’ S Specification . Ii g . 13 … Fig . 14 J . R . Jol > hins .e-rara · ETH-Bibliothek · No known copyright restrictions. Free to use for anything.
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