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Published online by Cambridge University Press: 15 September 2014
The apparatus which I used in a few experiments on silver wires was as follows:—To a beam, supported in stonework, a plate of copper was fastened, upon which a smaller plate could be tightly screwed. Between the two plates a very thick copper wire was secured, vertically. Its lower end was provided with a small plate of copper, fastened by screws. This plate served to make fast one end of the silver wire under investigation. The other end was joined in the same way to a second thick copper wire; this was provided with a horizontal round brass plate, through the centre of which it passed, and which acted as weight-carrier.
page 80 note * “Galvanismus,” vol. i. pp. 251-255, 2d German ed., 1872.
page 80 note † “Galvanismus,” vol. ii. pt. 1, pp. 227-230, 2d Ger. ed., 1873.
page 81 note * Instead of the formula given in “Galvanismus,” the following was used:—
The length of the German-silver wire as found by this formula was 1108·795 mm. As measured by the cathetometer its length was 1108·8 mm.
page 82 note * See Wiedemann's “Galvanismus,” vol. i. p. 255.
page 82 note † “Galvanismus,” vol. i. p. 310; “Neue Schweizerische Zeitschrift,” vol. xiv. (1855), p. 33.
page 83 note * “Ann. de Chimie et de Physique” (3), xvii. 1846, p. 253.
page 84 note * This measurement is marked in my notes as “inaccurate, owing to an error of observation.”
page 85 note * Proc. Roy. Soc. Edin., Session 1869-70, p. 3.
