Scientific American, Vol. 23, No. 25 (December 1870)

1870 · 10 pictures

Patents · Iron · Munn · Center · Inventor · Scientific American · Address · Bed rock · Specific gravity · Rocking beam · Steam boiler · Antedated november · Perpetual motion · Three times · Platinum spiral · Special attention

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