matthiessen augustus (6 Ergebnisse)

293 x 230 mm. 4to. Pages 177-184 pp. 2 tables. Dis-bound.

293 x 230 mm. 4to. Pages 161-176 pp. 6 tables, 2 engraved charts. Dis-bound.

302 x 231 mm. 4to. Pages 861-881, 883-886 (index), 25 pp. 12 tables, 1 fig.; lightly foxed. Dis-bound. Augustus Matthiessen pursued research on the electrical, physical, and chemical properties of metals and their alloys. Matthiessen's careful and exacting experimental work was important to the development of telegraphy, especially his researches on the conductivity of metals and alloys. Augustus Matthiessen received the Ph.D. in chemistry from the University of Giessen in 1853. From 1853 to 1857 Matthiessen worked with Bunsen and Kirchhoff at the University of Heidelberg. Matthiessen returned to London where in 1862 he held a lectureship in chemistry at St. Mary's Hospital Medical School and then became a lecturer at St. Bartholomew's Medical School. DSB, IX, p. 178. DNB, XIII, pp. 69-70.

293 x 230 mm. 4to. Pages 85-92 pp. 2 figs. Dis-bound.

Zustand: Very Good. Matthiessen, Augustus (1831-70). A.L.s. to Charles Tilston Bright and Latimer Clark. [London], April 20, 1865. 1- pp. 176 x 112 mm. Small holes in lower corner, tremains of mounting present. Provenance: Latimer Clark. Between 1862 and 1865 Matthiessen participated in the British Association's Electrical Standards Committee. His letter mentions some of the standard units that he manufactured in 1865 for the committee: "They are made of the Platinum silver alloys and are adjusted to 0.01 percent accuracy. With the aid of this and two small B. A. units the ratio for 100 B. A. units and so on, can be accurately produced." Origins of Cyberspace 176. .

Zustand: 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. .