Lot 677: Mance (Henry Christopher, 1840-1926). Portrait of the English electrical engineer Henry Mance sat at a small table with a prototype of his invention the heliograph, circa 1869, albumen print carte de visite, printed credit stamp of Sind, Kurrachee to verso and near-contemporary pencil note dating the photograph to November or December 1869, 9 x 6cm. In the photograph the young and bearded Mance sits in his army uniform with his hand resting on a morse code key attached to a swivelling device on which is mounted a rectangular plate with a hole in its centre, the apparatus is mounted on a rotating stand. Apparently a prototype of the heliograph, Mance started working on his invention in 1869 while stationed in Karachi. Mance made a patent application at the US patent office in February 1876. Rare. (1)
Dominic Winter's Antiques & Fine Art Auction October 2015
Thursday, 15th October 2015
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