XX11 CONTENTS 



561. Magnetic properties of cobalt at o° and ioo° C 469 



562. " " " nickel " " " " " 469 



563. " magnetite 469 



564. " Lowmoor wrought iron 469 



565. " Vicker's tool steel 469 



566. " Hadfield's manganese steel 469 



567. " saturation values for steels 469 



568. Demagnetizing factors for rods 470 



569- " " " " 470 



570. Magnetic properties of iron and steel 471 



571. Cast iron in intense fields 471 



572. Corrections for ring specimens 471 



573. Energy losses in transformer steels 472 



574. Magnetic properties of permalloy 472 



575. Dissipation of energy in cyclic magnetization, various substances . . 473 



576. Magnetism and temperature, critical temperature 474 



577. Temperature variation for paramagnetic substances 474 



578. effect on susceptibility of diamagnetic elements . . . 474 



579. " " paramagnetic elements . . 474 



580. Magnetic susceptibility 475 



Magneto-optic Rotation 



581. Magneto-optic rotation: General discussion 476 



582. Solids, Verdet's constant 477 



583. Liquids, " " 478 



584. Acids and salts in water, Verdet's constant. 478 



585. Gases, Verdet's constant 479 



586. Verdet's and Kundt's constants 479 



587. Values of Kerr's constant 480 



^88. Dispersion of Kerr effect 480 



589. " " " " 48o 



Various Magnetic Effects 



590. Resistance of metals : Bismuth, variation in transverse magnetic 



field 481 



591. Resistance of metals: Nickel, increase in transverse magnetic field. 481 



592. Change, in transverse magnetic field . . . .481 



593. Transverse galvanomagnetic and thermomagnetic effects .... 482 



594. Variation of Hall constant with the temperature 482 



Atomic Data 



595. International atomic weights, atomic numbers and valencies . . . 483 



596. Isotopes, packing fractions 484 



