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Average Value of the Annual Mineral Product of Cornwall and Devon
UNKNOWN American Periodicals Series II 1839
Cornish High-pressure, Expansive, Condensing Steam Engine at Carlisle
... Jour American Periodicals Series II 1839
With Remarks and Exemplifications by the Editor American Periodicals Series II 1839
... new Alloys of Zinc--a substitute of Bronze, Copper, and Brass
Mech ... American Periodicals Series II 1839
UNKNOWN American Periodicals Series II 1839