Items
Creator is exactly
Helmholtz, Hermann von
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[D8613A], Recommendation Letter from Hermann von Helmholtz to Franz Schulze-Berge, January 15th, 1886
1886-01-15 -
[D9055AAA], Letter from Hermann von Helmholtz to Thomas Alva Edison, January 2nd, 1890
1890-01-02 -
[D9148AAH1], Letter from Hermann von Helmholtz to Thomas Alva Edison, March 19th, 1891
1891-03-19 -
[SB134010E], Clipping, Scientific American Supplement, Hermann von Helmholtz, 1875-1879
1875-1879 -
[SM006085c], Clipping, Electrician (London), Hermann von Helmholtz, July 16th, 1881
1881-07-16 -
[SM033011a], Clipping, Telegraphic Journal, Hermann von Helmholtz, November 1st, 1874
1874-11-01