Scientific American, Vol. 22, No. 9 (February 1870)

1870 · 8 pictures

Patents · Munn · Machinery · Turret · Antedated · Iron · Scientific American · Steam pumping · Solution number · Steam engine · Antedated february · Traction wheel · Water wheel · Steam boiler · Patent office · Positive philosophy

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