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Published online by Cambridge University Press: 06 July 2012
The remarkable changes produced by magnetization in the internal volumes of hollow cylinders of iron, steel, and nickel have been described in Part I. (see Trans. R.S.E., vol. xxxviii. pp. 531–555). As pointed out in the closing paragraph, a complete discussion of these changes had to be “deferred until direct measurements of elongation had been obtained with the various tubes under the same magnetic influences.” It was not possible, of course, to measure the elongations of all the tubes that had been experimented with; for of these, eighteen (Nos. I. to VI. of each inclusive) were no longer in existence, having been the successive stages through which No. VII. was brought from the condition of small bore and thick walls to that of wide bore and thin walls.
page 472 note * Phil. Trans., Series A., vol. 179, 1888.
page 476 note * Mr Mitchell, a student in the Physical Laboratory, Edinburgh University, determined for me the Talue of Young's modulus by flexure experiments on the nickel sheets from which the coiled Tubes C2 C3 had been formed. The values found were respectively 2·1 ×1012 and 2·5 × 1012 in C.G.S. units.
page 477 note * Atti d. R. Accad. d. Lincei, vi. 1890.
page 478 note * Phil. Trans., Series A., vol. 189, pp. 189–200, 1895.
page 478 note † Phil. Mag., May 1896, p. 454.
page 478 note ‡ Proc. Roy. Soc., 1890.
page 478 note § See Duhem, American Journal of Mathematics, xvii. p. 117, 1895.
page 478 note || “Researches on Magneto-striction.” By Professor Nagaoka and Mr Honda. Journal of the College of Science, Imperial University, Japan, vol. ix. p. 353; also in Phil. Mag., for September 1898.