"Delivered before the Society of Arts for Scotland on 15th January 1840."--P. [205]. Originally published in The Edinburgh new philosophical journal, v. XXVIII, no. LVI, March 1840.
Reproduction Note:
Microfilm. Woodbridge, Conn. : Research Publications, 1981. on 1 microfilm reel ; 35 mm. (History of photography. Monographs ; reel 76, no. 809).