TransactionsPublished under the care of the General Secretary and the Treasurer . n bismuth, and did not arrive ata conclusive result; quite recently Shaw showed that the change oflength in practically non-magnetic substances is nil. The accompanying figures show the intensity of magnetizationand the changes of length^ in different fields (II --= external field —demagnatizing factorXintensity of magnetization) for iron, steel,cobalts, and nickel steels. 3. Literature on the chansfe of len^h by magrnetization:— Nagaoka , Journ. Coll. Sci. Tol-cvo. 57, l&OO: Rhaw a. Laws, Electrician


TransactionsPublished under the care of the General Secretary and the Treasurer . n bismuth, and did not arrive ata conclusive result; quite recently Shaw showed that the change oflength in practically non-magnetic substances is nil. The accompanying figures show the intensity of magnetizationand the changes of length^ in different fields (II --= external field —demagnatizing factorXintensity of magnetization) for iron, steel,cobalts, and nickel steels. 3. Literature on the chansfe of len^h by magrnetization:— Nagaoka , Journ. Coll. Sci. Tol-cvo. 57, l&OO: Rhaw a. Laws, Electrician,46, 649, 738. 1901; Austin, Phys. Rev. 10. 180. 1000; Nagaoka a. Honda,Nature. 65. 246. 1002; Comptes Rertdus, 13^, 536, 1902; Rhoads, Phil. 463, 1901; Nasraoka a. Honda, Phil. /,, 45, 1902: Honda a. Shimizu,Phys. Zeit., 3, 378. 1902, Phil. Maq., 4. 338, 1902; Wills, Phys. Rev., 15,7, 1902; Van Aubel, Phys. Rev., 16, 60, 1903; Shaw, Proc. Roy. Soe., 72,370, 1903; Nagaoka a. Honda, Journ. Coll. Sci., Tokyo, 19, Art. 11, 1903. NAGAOKA: MAGNETOSTRICTION. 347. Gast Cobalt Annealed Cobalt Nickel 0 100 200 300 400 500 600 700 800 ): Fig. 1.


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