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Murphy & Allison.

West view of Schuylkill Falls Laboratory. Powers & Weightman, manufacturing chemists, Philadelphia.

Explosion and burning of the cartridge factory, cor. Tenth and Read [sic], March 2[9]th 1862.

Plan of the United States dry dock, at Philadelphia, on the new system of the sectional floating dock, basin, & railways, now constructing by contract with Mess. Dakin & Moody.