Scientific American, Vol. 33, No. 3 (July 1875)

1875 · 12 pictures

Keely · Iron · Improved · Piston · Water · Patents · Keely motor · Inch · Attorney keely · Positive pole · Scientific American · North Pole · Piston speed · Wrought iron · Square inch · Horse power · Letters patent

Internet Archive · Public domain (published before 1931) · More from this library