Scientific American, Vol. 33, No. 6 (August 1875)

1875 · 13 pictures

Patents · Improved · Drill · Boiler · Ether · Iron · Patent law · Scientific American · Pound sinker · Patent office · Cutting edges · Wrought iron · Trade mark · Small quantity · Tin foil · Lord chancellor

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