1872
by Matthiessen, Augustus
1872. Very Good. Matthiessen, Augustus (1831-70). A.L.s. to Latimer Clark. [London], December 19, 1872. 1- pp.178 x 112 mm. Small hole punched in upper margin. Provenance: Latimer Clark. Matthiessen, a chemist and physicist, performed studies of the electrical conductivity of copper in connection with the telegraph, which are alluded to in his letter: "Would you kindly inform me what is the maximum conducting power of the copper you can get in large quantities from the drawers? I think it will shortly be possible to get any amount of wire at 95 pure copper being 100 for I am making experiments on the subject. . . . " Origins of Cyberspace 175. . (Inventory #: 40761)