... 18 92.]ST'EINMETZON THE LAW OF HYSTERESIS.39Withregardtohysteresis,thiskind of cast-steelis50percent.worsethan the annealedcast-steelNo. 1, butstilltwiceasgoodas the hardenedsample.But,magnetically,itispoor-thatis, of lowconductivity,givingfor40ampereturnsM.M.F.percentimetreleingthonly-6600lines of magneticforcepersquarecentimnetre.while the annealedsteelgives, 14 ,000-thatis,morethantwiceasmany,andeven the hardenedsteelgivesmore,8000.SOFTMACHINESTEEL.FIG. 12 .TABLEIX.I.ILIII.FBrBdBrBdFBrBd0±8.39.650I5.9i6.855.7-+-I0.2-7-5 +11 .255I6.4I7.0 10 +I.2II6-20 12 .46oi6.9 17 .4I57-4 12 .6+7.2 13 .565I7.3I7.7201I.0I1.4 10 .9 14 .270 17 .7I8.025 12 .6I3.8 12 .4 14 .875I8.0I8.230 13 .5 14 .2 13 .3 15 .38oI8.3I8.435 14 .2 14 -5I4.0 15 .785i8.6I8.740 14 .8I4.7i6.o90I8.845(39-0.)I5-3I6.4(90.0.)obs44,40064,ooo.00944!00928Average,;q-.00936henceH44,00064,600calc.A-400+600± 1. 0percent.ÆTHERFORCE ... 18 92.]STEIN-METZON THE LAW OF HYSTERESIS.F.B. 1. 52970024,35037 ,10 048,8505 10 ,0006 10 ,800TABLEIV. (1. )F.B.7 1 J,7008 12 ,2009r2.700 10 13 ,10 00 12 23,900 14 24t500i6 15 ,00023F.B.IS 15 ,45020I5,80025i6,40030xI6,8oo35 17 ,20040 17 ,500HYSTERESIS.Bmagnetization,inIiiues of magneticforcepersquiarecentimetre.Hfloss of energybyhysteresis,inergspercycleandcm'.( 10 -7joules)-t+H3EIA_;yB'6loss of energybyhysteresisproper,inergspercycleandcmin.(- 10 -joules).ll,eN 12 -loss of energybyeddy-currents,.inergspercycleandcm'.(- 10 -7joules).TABLEIV.(2.)Frequency,1N78.H ,11 11 2J 1( I)icalc.2,o60I,o8o3 ,14 03,5402 ,12 05,66o7,7405,600 13 ,34022,960I10, 710 23,67024,880 1 I2,72027,600 17 ,280T5,90033,T80.003 31 H,2,6504,490 1, 5308,640 1, 300I9,860£.1lX 10 -6obs.3,060+8o+2.65,640+20+*3I3,440-I00-.824,540-870-3-726,460+I"40+4.033 .18 0 ... 18 92.]STEIN-METZON THE LAW OF HYSTERESIS.F.B. 1. 52970024,35037 ,10 048,8505 10 ,0006 10 ,800TABLEIV. (1. )F.B.7 1 J,7008 12 ,2009r2.700 10 13 ,10 00 12 23,900 14 24t500i6 15 ,00023F.B.IS 15 ,45020I5,80025i6,40030xI6,8oo35 17 ,20040 17 ,500HYSTERESIS.Bmagnetization,inIiiues of magneticforcepersquiarecentimetre.Hfloss of energybyhysteresis,inergspercycleandcm'.( 10 -7joules)-t+H3EIA_;yB'6loss of energybyhysteresisproper,inergspercycleandcmin.(- 10 -joules).ll,eN 12 -loss of energybyeddy-currents,.inergspercycleandcm'.(- 10 -7joules).TABLEIV.(2.)Frequency,1N78.H ,11 11 2J 1( I)icalc.2,o60I,o8o3 ,14 03,5402 ,12 05,66o7,7405,600 13 ,34022,960I10, 710 23,67024,880 1 I2,72027,600 17 ,280T5,90033,T80.003 31 H,2,6504,490 1, 5308,640 1, 300I9,860£.1lX 10 -6obs.3,060+8o+2.65,640+20+*3I3,440-I00-.824,540-870-3-726,460+I"40+4.033 .18 0...