U.S. Signal Office circulars, 1870-1873. [1870-1873]

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U.S. Signal Office circulars, 1870-1873. [1870-1873]

2 v. ; 21- 27 cm.

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Howgate, Henry W.

http://n2t.net/ark:/99166/w6rb7t0p (person)

Charles Babbage was a mathematician and inventor. From the guide to the Charles Babbage selected correspondence, 1827-1871, 1827-1871, (American Philosophical Society) ...