CONTENTS. xix 



449. Magnetic properties of various types of iron and steel 369 



450- " a specimen of very pure iron (0.017 %C) . 369 



451. " electrical sheets 35^ 



452. " American magnet steel 370 



453. " a ferro-cobalt alloy 370 



454- " a ring sample transformer steel, weak field . 370 



455. " : ' iron in very weak fields 370 



456. Permeability of some specimens of Table 445 37! 



457. Magnetic properties of soft iron at o and 100 C 371 



458. " steel at o and 100 C 371 



459. Magnetism and temperature, critical temperature 372 



460. Temperature variation for paramagnetic substances 372 



461. effect on susceptibility of diamagnetic elements .... 372 



462. " paramagnetic elements ... 372 



463. Magnetic properties of cobalt at o and 100 C 373 



464. " nickel " " " " " 373 



465- " magnetite 373 



466. " Lowmoor wrought iron 373 



467. " " Vicker's tool steel 373 



468. " Hadfield's manganese steel 373 



469. " saturation values for steels 373 



470. Demagnetizing factors for rods 374 



471. " " " " 374 



472. Dissipation of energy in cyclic mange tization, Steinmetz constant . 375 



473. Energy losses in transformer steels. . 376 



474. Magnetic susceptibility 377 



MAGNETO-OPTIC ROTATION 



475. Magneto-optic rotation, general discussion 378 



476. solids, Verdet's constant 379 



477. liquids, Verdet's constant 380 



478. " salt and acid water solutions 381 



479. " gases, Verdet's constant 382 



480. Verdet's and Kundt's constants 382 



481. Values of Kerr's constant 383 



482. Dispersion of Kerr effect 383 



483- " " " " 383 



VARIOUS MAGNETIC EFFECTS 



484. Resistance of metals, variation in transverse magnetic field (Bi) . . 384 



485. Increase of resistance in transverse magnetic field (Ni) 384 



486. Change of resistance of various metals in magnetic field 384 



487. Transverse galvanomagnetic and thermomagnetic effects 385 



488. Variation of Hall constant with temperature 385 



