Scientific American, Vol. 21, No. 7 (August 1869)

1869 · 8 pictures

Patents · Acid · Phosphate · Iron · Phosphoric · Phosphoric acid · Water · Carbonic acid · Wrought iron · Antedated july · Sulphuric acid · Acid phosphate · Pulverulent phosphoric · Carnauba wax · Scientific American · Turbine water

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