The London, Edinburgh and Dublin philosophical magazine and journal of science . reflecting mirror, described in the preceding paper, wasbrought in contact with the copper wire under slight pressureto prevent sliding. The magnetizing coil was so long thatthe bar lay in a nearly uniform field. The results of expe-riment are given in fig. 3. Here H denotes effective field Fisr. 3 «W. and y the magnetic change of length per cm. We observe that the elasticity of a substance undergoing a large changeof length is also similarly affected by magnetization. 464 K. Honda, S. Shirnizu, and S. Kusakabe on
The London, Edinburgh and Dublin philosophical magazine and journal of science . reflecting mirror, described in the preceding paper, wasbrought in contact with the copper wire under slight pressureto prevent sliding. The magnetizing coil was so long thatthe bar lay in a nearly uniform field. The results of expe-riment are given in fig. 3. Here H denotes effective field Fisr. 3 «W. and y the magnetic change of length per cm. We observe that the elasticity of a substance undergoing a large changeof length is also similarly affected by magnetization. 464 K. Honda, S. Shirnizu, and S. Kusakabe on Change of 4. Soft Iron.—In observing the deflexion from our scale-reading by passing a current through the coils, we were firststruck with the large effect contrary to the results of previousexperimenters. The largest deflexions for soft iron andWolfram steel amounted to about 9 cm. with a scale at2*61 m. distant in a field of 500 units, while for a steelbar it was only one third. Even nickel, for which the distancebetween the two fulcrums was only 22 cm., showed a deflexionof 3 cm. The curves for the change of depression corresponding todifferent loadings in soft iron are given in fig. 4. Ordinates Ffc. 4. -!0 cm / T~2\50 // V T--U30 1/ If/ T=60 V T=II0 \{ 10 2( 10 3( 10 4( >0 51 >0 H y. represent in centimetres the amount of the change of depres-sion, take
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
