CONTENTS. xiii 



297. Permeability of transformer iron : 



(a) specimen of Westinghouse No. 8 transformer . . . 286 

 (*) " " " 6 287 



(V) " " " 4 " . . 287 



(d) " " Thomson-Houston 1 5oo-watt transformer . . 287 



298. Magnetic properties of iron and steel ....... 288 



299. " " " cast iron in intense fields 288 



300. " corrections for ring specimens ...... 288 



301. Demagnetizing factors for rods ........ 289 



302. " " Shuddemagen's values ..... 289 



303. Composition and magnetic properties of iron and steel . . . 290 



304. Permeability of some of the specimens in Table 303 .... 292 



305. Magnetic properties of soft iron at o and 100 C 292 



306. " " " steel at o and 100 C 292 



307. " " " cobalt at 100 C 293 



308. " " " nickel " " " 293 



309. " " " magnetite ....... 293 



310. " " " Lowmoor wrought iron ..... 293 



311. " " " Vicker's tool steel 293 



312. " " " Hadfield's manganese steel .... 293 



313. Saturation values for different steels 293 



314. Magnetic properties of iron in very weak fields 294 



315. Dissipation of energy in cyclic magnetization of magnetic substances . 294 



316. " " " " " m " " cable transformers . 294 



317. " " " " " " " various substances .295 



318. " " " " " " " transformer steels .296 



319. Magneto-optic rotation, formulae : Verdet's constant .... 297 



320. " " " in solids 298 



321. " " " " liquids 299 



322. " " " " solutions of salts and acids in water . . 301 



323. " " " " " " " in alcohol . . . .303 



324. " " " " " " " " hydrochloric acid . . 303 



325. " " " gases .... ... 304 



326. Verdet's and Kundt's constants 304 



327. Magnetic susceptibility of liquids and gases ...... 305 



328. Values of Kerr's constant ......... 305 



329. Variation of the resistance of bismuth in magnetic field . . . 306 



330. " " " " nickel " " " . 306 



331. " " " " " various metals in a magnetic field . .306 



332. Transverse galvanomagnetic and thermomagnetic effects . . . 307 



333. Variation of the Hall constant with the temperature .... 307 



334. Appendix : Mean specific heat of iron at high temperatures . . . 308 



335. Total heat of iron to high temperatures .... 308 

 " Definitions of units 309 



Index 313 



