150 South—Manufacturing at Petersburgh Va. sow a Gas from Gasoline more Dangerous than Coal Gas. 41we To Ascertain the Power of a Microscope. A California Saw Mill., scientific american, 1869-03-06

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150 South—Manufacturing at Petersburgh Va. sow a Gas from Gasoline more Dangerous than Coal Gas. 41we To Ascertain the Power of a Microscope. A California Saw Mill., scientific american, 1869-03-06

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