XV.—The Strains produced in Iron, Steel, Nickel, arid Cobalt Tubes in the Magnetic Field. Part II

Abstract

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.