Mica Screen
1907-02
Specimens of the Macdonough Colour Process of photography, given to Sir W.J. Herschel in 1901 by Mr. Tripp, M.F.W. Cat. No. 141. (a) A piece of the earliest Macdonough viewing screen on mica. (b) Viewing screen on glass. (c) Fragment of a fine 3-line black & white positive for use with coloured viewing screen. (d) Black & white positive of coloured flowers for use with coloured viewing screen.