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Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 472
NSTRUMENT FOR MEASURING RADIANT HEAT. Constructed by CAPTAIN JOHN ERICSSON. PAGE 449. CWmCHT". ENIL N.Y.Engineering
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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