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Scientific American, Vol. 20, No. 10 (March 1869) (1869)
leaf 15
er annum each.Specimen copies will be sent gratis. MCJNN & CO., Publishers.37 Park Row, New York* THOSE WISH- ing to secure their rightsby Letters Patent Are referred to an adver-tisement on another page. An Illustrated Pam-phlet containing the Pat-tent Laws, and full par-ticulars concerning… … © 1869 SCIENTIFIC AMERICAN, INC.Patents · Iron · Velocipede · Manufacture · Pipes · Scientific American · Wheel · Clay pipes · Twenty days · Patent granted · Cotton mill · Petersburgh cotton · Coal gas · Patent office · Hydrogen gas · Oflice twenty
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