The London, Edinburgh and Dublin philosophical magazine and journal of science . 5. Steel.—The general character of the change of depressionis similar to that of soft iron, as given in fig. 5 ; but the * Clebschs Elasticitcit, p. 37-5; Winkelmanns Physik, i. p. 266. 466 K. Honda, S. Shimizu, and S. Kusakabe on Change of initial decrease is not observed. Some of the values of -^are given in the following table : — h/t-kw . 1251 gr. 2184 gr. 3096 gr. 50 0-14 Xl02 0-15 X10 ~2 0-17 xl0~2 100 0-22 0-25 025 200 027 0-33 031 300 0-28 037 035 400 030 0-40 039 This steel bar shows a comparatively small
The London, Edinburgh and Dublin philosophical magazine and journal of science . 5. Steel.—The general character of the change of depressionis similar to that of soft iron, as given in fig. 5 ; but the * Clebschs Elasticitcit, p. 37-5; Winkelmanns Physik, i. p. 266. 466 K. Honda, S. Shimizu, and S. Kusakabe on Change of initial decrease is not observed. Some of the values of -^are given in the following table : — h/t-kw . 1251 gr. 2184 gr. 3096 gr. 50 0-14 Xl02 0-15 X10 ~2 0-17 xl0~2 100 0-22 0-25 025 200 027 0-33 031 300 0-28 037 035 400 030 0-40 039 This steel bar shows a comparatively small increase of elasticity. With the present specimen, the value of -„- under a given field reaches a maximum with a load lyingbetween 1270 and 2200 grams. 6. Wolfram Steel.—The change of depression for Wolframsteel bar by magnetization is similar to that for soft iron, asshown in fig. 6. It is still greater, and the curve does not Fiar. 6. 918 7/. tend to become asymptotic. The initial decrease of elasticityis more marked in the metal than in soft iron and occurseven with the smallest load. values of -^- for different fields and loadings : The following table contains the h/t+iw. 358 gr. 797 gr. i 1378 gr. 2206 xlO2 70 1-79 xl0~2 1-88 xlO-2 T67 XlO2 100 2-05 2-02 1-79 1-64 200 2-55 2-27 2-00 1-80 300 293 2*42 2-10 1-89 400 3-26 2-eo 2-18 1-92 500 354 2-68 2-23 1-97 467 Elasticity of Ferromagnetic Substances by Magnetization. ^ The above table shows that the increase of elasticity under agiven field becomes generally less as the load is increased. Inweak fields, however, a maximum is observed as in the caseof steel. ^ It also increases first rapidly and then slowly a*the field is increased. 7. Nickel.—Xickel rod shows an abnormal behaviour asregards the change of elasticity by magnetization. The Fiar. 7. T ioV/ -T=l -3 +9 u 10 — T-;? % rf£= -J^-~ H ¥* results of observation ;;re graphic
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
