Scientific American, Vol. 80, No. 21 (May 1899)

1899 · 15 pictures

Niagara · Patents · Bicycle · Color · Falls · Apparatus · Scientific American · Munn · Smokeless powder · Patent office · Niagara falls · Fiscal year · Horse power · Cubic feet · Power house · White light · Caustic potash

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