None
oomparisoD ol, prodnoed by a and ^ rays, 203 of imc eolphide, 302 ot barium platino-oyanide, 903 of willemite and konzite, 203 produced by radium emanation in snb- aUnces, 203. 2S3 diminution of, with time, 205 of radium compounds, 20S prodnotion of by heat (thenno-lumin- eecence), 207 Dse of, to illuBtiate coodeDsation of 1, 547 «( leq. Phosphonis action ot radinm ray« on, 214 ionization piodnoed by, 529 Photo-electric action prodnoed by radium raya in certain ibstanees, 214 ot photographic action wiAi ionization, 646 Physieal action ot radinm rays on sparks, 208 on eleetrodelees discharge, 306 on selenium. 208 on oonduetiTity of insnlators, 909 Physiological action of radinm n^s production of boms, 216 effect on bacteria, 216 effect on eye, 317 Piezo-Slectriqne ot qnaits description of, 105 Fitchblendes comparison of radio-aotiTity of, 11 radio-elements separated from, IS el leq. radium eon tin nally produced from, 4fi9 constitution of, 5S7 PolariEation ot uranium rays absence of, 7 Polonium methods of separation of, 39 rays from, 2B decay ot activity of, 23 discussion ot nature ot, 24 Himilatitj to radio-tellurium, 26 magnetic deviation of a r^B from, 146, 150 slow moving electrons, 168 increase of absorption with thiokueia ot matter traversed, 168 oonnection of, with radium F, 411 Potential required to produce satniatiou, 83 fall of potential needed to prodUM , 58 Dig lizedoy Google Potentill (cow.) gradient da« to moTement of ions, 65 Preclit uiil Bnnge apeotrcm of ndinm, 17 atomic weight of rodiom, 18 heating efleot oF Todinm, 430 Preronre eSaet ot, on velooit; of ioni, 46 effect of, on onrreat tbiongh gases, 61 et ttq. production of emBnation independent of, 260 effect of, on diBtribatioD of eioited Mtivitj, 317 •Sect of, on natural oonduotirit; of air in closed ressels, 6B4 Ftoducts, radio-aotivfl list ot, from tadio-elaoieuta, 449 propertieB of, 449 amount ot in radiam, 4fiS et ttq. radiations from, 46G Qnartz pieEO-Mectriqne use of, in meaearement of onraent, 108 Quinine sulphate djtcbaiging power of, 6S0 phoephoreseenee of, S30 BndJBtioDs emitted b; u .. . ., _ emitted b; thorinm, 10 emitted bj radium, 18 emitted bj actinium, 21 emitted b; polonium, 38 method of measurement ot, 82 et teq. methods of oompaiison of, 108 three kinds of, 109 analog; to rave from a Crookea tube, 110 relative ionizing and penetrating power of, 111 diflcalties of oomparntlve measure- ment of. 112 p nje, IIS y rajs, 179 •econdarj rajt, 187 eomparlion ot ionization ot a and a ra^s, 194 pbosphoreBoetit effect of, 301 et teq. phjucal actions of, 207 et teq. chemical aetions of, 318 et ug. physiological actions ot, 316 from the emanation, 863 from Ur X, »47 connection ot, with heat 421 et teq. ttom different active prodn SX 673 Badiations (coitt.) conservation of energy of eaeh speciflo tjpe of, 469 et ttq. Radio-lead oonneetion of, with poloniom, 411 et teq. oonneetion of, with radium D, 41S Badio-telliuium rate of deci^ of, 411 eonoeation of with radlnm F, 411 Radium disooverj ot, 13 separation of, IB spectrum ot, 16 atomic weight ot, 17 radiations from, 18 compounds ot, IB nature of radiations from, 109 p rays from, 113 a rajg from, 141 7 ra;s from, 179 seoondu; rajs from, 187 production ot pboeptaoteseenoe bj, 301 et tea. spectrum of pboaptioreaaent light of, 300 phTSieal aetlona of. 207 el teq. chemical actions of, 213 et teq. physiological actions ot, 216 emanation horn, 346 propertiee of emanation from, 347 et teq. chemical nattire of emanation bom. diffusion of emanation from, 269 condensation of emanatioa tram, 377 amount of emanation from, 388 volume of emanation &om, 289 spectmm of emanation from, 293 excited radio-activity from, 295 et teq. decay of excited activity from, 806 diffecenca in propertjes of radium and the B2T alteration of activity of, by removal of emanation. 371 et iiq. recovery of activity of, after removal of emanation, 873 effect of escape of emanation on re- covery of activity of, 374 non-separable activity ot, 875 period and properties ot radium A, B and C, 376 et teq. analyds of active deposit ot rapid ohanges of radium, 877 analyBta of ^ ray curves, 381 et teq. ana^ais of a ray carves, 386 et $eq. equations of activity curves, 889 D„t,i.a,G00glt' relative activity due to prodii«t« of, S96 aetive deposit ol ebw tranafonnation, 897 phjsioal and ohemical propertiai of radiom D, E and F, S98 et leq. effect ol Uanperatnre on aetiTs de- posit of BloiT ohanftfl, 401 ■eparatioQ of radinm F b; binuDth, 403 prodnots of, 403 «t tq. tait at transformatioii of Tadiiun D, 4M et Hq. variation of the aotiTlty of ths aottre deposit over long periods of time, 407 amonots of radiom D, E and P in old radinni, 408 variation of sotivitj of, with time, 409 pTodnets of in pitchblende, 410 orif[in of radio- tellnrimn, 411 origin of poloninm, 411, 413 origin of radio-lead, 41B temporary activity of inactive matter Bcparatad from pitchblende, 41S €t teq. disenaaioii of theories of radio -aotivitj of, 441 tt ttq. energy of radiations, not derived from eitemal sooroe, 443 tt uq. theory of radio-active change, 414 el itq. hit of active prodacts of, 449 amonst of prodocts of, 463 rate of change of, 4G7 life of radinni, 457 origin o( 469 tt leq. prodoction of, by nraninin, 4fi9 et teq. amount of in 1 gram of nraninm, 461 amonnt of, in minerals, 461 radio-activity of, independent of oon- oentration, 468 et teq. diBappeaiance of, 467 life of, independent of conoentration, of radio-Botivi^ of, 469 ei uq. loss of weight of, 473 eiperimenli to determine lou of weight of, 174 Badinm (cimt.) total emission of aaergj from 1 gram of, 474 et teq. prodnction of helinm from, 476 helium, disintegratioo prodaot of, 479 amonnt of helinm from, 180 possible osnses of disintegiatioa ot^ 466 St leq. amonnt of, to scooQOt fbr heat of snn, 491 possible oonneotioD of with heat of son, 491 poesiUe oonneotion of with hsnt of earth, 49S probable amoant of, in earth, 195 amonnt of, in atmosphere, 495, 6M presence of, in atmoqibere, 631 et teq. Radium A decay onrve of, 978 radiation fton, B8I effect of, OB activity curves, 886 et ttq. connsetion with later chafes, 893 activi^ supplied by, 893 effect of 4emperBtQrf! on, 890 Toktmty of, 3»0 absenoe of heating effect of, 49S nature of rayless change in, 461, 55S Badinm C radiations from, 881 analysis of p ray corves of, 881 tt teq. analyBiB of a ray curves of, S86 et uq. effect of temperature on, 890 activity snpplied by, S94 et teq. heating effect of, 435 use of. as a source of fi rajs, 4S6 explosive nature of change in, 45G magnetic deSeotion of rays bom, M3 velocity and value of f/si (or rays from, M4 Radium D origin of name of, 876 of, with active deposit. -aDsformation of, 106 variation of activity, 407 old radinm, 408 a activity of old radium, lOS period of t effect of, Ol presence ii effect of, ( etteot of temperature on, 401 connection ol, with fi ray activity of active deposit, lOS, 400 Dig lizedoy Google Badiam B (eont.) aounsotion with rftdio-lud, 118 Badlum F TuiatioD of actiTitj due to, SV8 efFeot of temperMuie on. 401 saimntioD of, od b»mDth plate, 403 aoDneotian with active depoait, 40S variation of aotivit? of, over long periods of time, 407 prewnoe in old radium, 409 effect of, on aotivitj of old radium, 409 presetice in pitchblende, 410 eonnection vrilh radio- tcUtuinm, 411 oonneotion with poloniiun, 411, 4ia oouneotion with radio-lead. 41S radio-aotivity of, 505 decaj of activity of, 506 Bamsa;. Sir W. amount of helium in thorianite, 486 Bamaay and Collie apeotram of emanation, 293 Bamsay and Cooke radio-activitj produced by radiation from radium, 472 Bameay and Soddy evolution of gai from radium, 316 produotioD of hydrogen and oxygen from radium, 215 chemietJ nature of the gaseotu nature of the emanation, 368 Tolame of emanation, and onange with time, 289 helium from radium emanation. 291 amount of heHum pcodoced b; n- dium, 4B0 Bameay and Travers amoDnt of helium in fergueonite, 486 Bay lew cbanges dlecaBslon of, 454, 662 Be, F. theory of radio-activity, 441 Becombination of ions, 40 tt teq. eonstuit of, 42 Beoovery of activity of thoriDm aftoi ranoval ot Tb X, 231 of activity of uianimn after removal of Ut X, 323 tignilioanoe of law of, 234 effect of aonditions on rate of, 233 of activity of radiom after removal of 372 EX 575 BefleotioD [eont.) di&DBe raflectioti of raya, 7 Befraction no evidanoe of, for uranium rayi, 7 B^enention of smanating power, 366 Bichaiz and von Hehuholta aotioD of iona on steam jet, 47 iticharz and Schenok theory of radio-activity, 141 BoBBignoI and Qimingham decay of thoiiam emanation, 343 Bonge apeotram of radium, 17 BuDge and BHdUndsr evolution of gae from radium, 216 Bunge and Preoht speotrnm of radium, 17 Btomie weight of radinm, 18 heating effect of radium, 420 photographio action of anbatanoea, 63 B»ake amount of emanation in air at high altitude*, 519 Salomonsen and Dreyer coloration of quartz by ladiom raya, 313 Satoration ourrent meaning of, S3 tt itg. application of, to meaBurementa ot radio-activity, 84 measnrement of, 100 et leq. S^enck radium emanation in springs, 61S Sohenok and Bioharz theory oT radio-activity, 441 Schmidt discovery of radio-aotivity ot thoriam, 10 Sohmidt and Wiedemann therms- luminesoence, 307 SchuBtar number of ions per o.e. in air of Munchester, 638 radio-aotiTity of matter, 539 Behweidlor and Mache velocity of ions in air, 628 Sobweidler and Meyer magnetic deviation of ^ raja by eleetrieal method, 113 absorption of p raya of radium by matter, 136 activity proportional to amount of of heating effect of radium, 42S effect of crystallization on activity of uranium. S49 rate of decay of radio-tellurinm, 411 DiglizedoyGOOglf oonneotioD of, nith a nji, 1S8 illnttntion ot, b; ipintbarisoope, 156 MOM ot, 160 prodnctioD ol, by BotioQ of eleotrio flald, ISO I of moTing charged 7 3t, b7 photugraphia body, 71, 1' BeoondWr7 tbjb produotion of, b; p and 7 rkjB, 1B9 et irq. from diffeient materiala, 191 amount of, depends upon atomic ireigbt, 192 magnetic deflection of, IBS Beiti •baorption of electrons hj matter, 187 ft teq. Beleninm action of radium rayi on, 908 Simon value ot eJM for cathode n,yA, 76, 129 Simpson kmoant of excited aotiTity in north of Norway, G19 Blater, Miw effect of temperature on active de- posit of thorium. 861 Smolan, Beattie and Kelvin diioharging power of nraninm raye, 7 nidiO'actiTitj of, 606 deoay ot aotivitv ot, S07 Soddj oanip«mton of photographic and elM- trical action of nraninm raya, SS nature ot tvja from Ur X, 847 production of radinm trttia nraninm, 46S Soddy and Rameay evolntioQ of gas from radinm, 215 produotion of hydrogen and oxygen from radinm, 216 cfaemioal uatore at the emulation, 268 gaoeoni nature of the emanation, 268 volume of the emanation, and change helium fiom radiom emanation, 391 amount of helium produced by ra- dinm, 480 Boddy and Butherford ■eparstion ot Tb X, 330 Boddy and Butberforct Jeont.) deeay of activity ot Th X, 231 recovery ot activity of thorium freed from Th X, 331 deoay of actirily of Ur X, 233 reooveiy of activity of uranium freed from Ur X, 22B explanation of decay and reooveiy onrvei, 224 rate of production of Th X, 337 theory of decay of activity, 229 influence of oonditiona on rate of decay and reoovcty of activity, 233 disintegration hypotheiid, 234 decay of activity of radinm emana- tion, 947 meaBmrementa of emanating power, regeneratlDn of emanating power, 356 constant rate of production ot emana- tion of radium and thorium, 357 aoniee of thorium emanation, 361 radiations from the emanation, 264 chemical nature of emanatEon, 367 aondensatton of emanations of radium and thorium, 277 temperature of oondenaation of ema- nation, 278 effect of succesBive precipitattone on activity of thorium, 368 recovery of activity of radium, 873 theory of rodjo-aotivity, 439 theory of radio-active change, 445 eouMrvkUon ol radio-activity, 469 Soil radio-activity of, S07 et teq. diHerenoe in activity of, 608 et »eq. Solution ooloration of, by radium, IS ot active deporit in acids, SIS eleotrolyiis of active, SIS of thorium emanation. 361 of radium and actinium emanations, 263 Spark action of radinm rays on, 308 Spectrum spark epeetrum of mdinm, 16, 16 flame spectrum of radinm, 17 effect of a magnetic fleld on spectrum of radium, 17 ot polonium, 33 ot phoephoreecent light ot radium bromide, 306 of 393 Dig lizedoy Google Spinthariicope deMiiption of, IBS BpriDgB emaDBtiou from wat«r of, SIS SUik energy to prodoee an ion, S8 Btoney, Johnstone vae of teno electron, T6 StiauBB and Hofmann radio-Active lead, 37 Stratt eoodDOtiTitf of gaeea for iadi4tion, 63, 64 condnctirity of gases prodaoed by y rajB, 64, 183 negative charge carried by fi rays, 122 et itq. absorption of ^ rays proportional to density, 186 nature of a rays, 142 attempt to meaHtire charge of a raya, IfiS eoDstant ratio of aranium to radinm in mineralB, 462 a of thoriam with heliam. absorption of radium rays from son by atmosphere, 492 presence of radium in Bath vaterl, JJ13 tadio-aotivity of ordiuaty matter. Temperatore effect of, on intensity of radiations from uraniom and radium, 210 effect of, on luminosity, 210 rate of decay of radium emanation unaffected by, 249 of condensation of emanations, 288 rate of decay of thorium emanation unaffected by, 287 effect of, on excited activi^, 81G effect of. on actiTe deposit of thorium, 364 effect of, on active depoeit of ae- tininm, 368 effect of, on active deposit of rapid change of radium, S90 effect of, on active deposit of alow change, 401 of radium above surrounding space, 419 effect of, on amount of eieited ac- tivity in atniospbere, G18 effect of, on natural ic ''^■ I of, 487 t discussion of, 441 et uq. disintegration theory, 44S <I uq. Thermo-Iuminesoence, 207 Thomson, J. J. relation between current and voltage for ionized gases, 34 diSerenoe between ions as eonden- salton Dualei, 49 charge on ion, 50 magnetic field produced by an ion in motion, S9 apparent mass of eleotron, 71 action at magnetic field on moving ion. 72 determination of tjm for cathode stream, 73 origin of X rays, 80 slow velcraity eleotrons from radio- tellarium, 133 charge carried by o rays, 164 theory of radio-activity. 440 cause of beat emission from radium, 442 structure of atom, 487 possible causes of disintegration of radium, 487 nature of eleotrons. 496 emanation from tap-water and deep weUa, 610 radio-activity of ordinary materials, 689 Thomson, J. J. and Sutberford ionization theory of gases, 31 tt leq. Thoriam disoovery of radio-activity of, 10 preparation of non-radio-active tho- rium. 39 natnre of radiations from, 109 jj rays from, 114 s rays from, 141 7 rays from, ISO separation of Th X from, 320 recovery of activity of, 221 disintegration of, 384 emanation from, 338 properties of emanation from, 289 diffusion ol emanation from, 275 condensation of emanation from, 377 excited radio-activity from, 295 et $tq. analysis of active deposit - of, SSI ■t Mg. ntylesB change i: explanation of initial portion of decay S63 DiglizedoyGOOglf prMpitetlonB on, recov6i7 eoive after large number of praaipiUtiona, Sfi9 ptodacU ot, S63 tion-sep«nliI« oetiiity o(, S69 radiations from active prodoota o(, 863 division of Mtivitj amongst Mtire prodactB of, S63 rate of emisidoD of onergj hj, 4S3 theories of radio-activit; ot, 4ttB diBousBJon of theoHet of »dio-aa- tivity, 441 et ug, ■oaroe of energy of radiations. 44S tt ■eg. tbeory of radio-aotive obange, 444 tt trq. tftbie of radio-active prodaati ot, 449 rate of cbange of, 456 lite ot, 468 conservatioQ of radio-aotivity of, 489 total emisBion of enetg; from 1 grwn of, 476 possible oauses ot disintegration of, 486 el leq. Thorium A period and properties ot, 863 >t ttq. absenoe of rajs in, 352 effect ot ti Thorium B period and properties of, SG3 tt ttq. effeat ot temperature on, 864 radiatioDB from, 868 Thorium X methods of sepaiation of, 330 law ot decay of aotivitj of, 331 iaw of recovery of aetivitj of, 331 theory to explain production of, 334 material natore of, 236 oontinnons prodnotion ot, 337 explanation of deoay of activity ot. I the rate of 329 effect of condition! <: change of, 283 disintegration hypothesis to explun production ot, 384 minute amount of, prodnoed, 237 effect of successive separations of, on activity of thorium, 368 el teg. analysis of decay and recovery curves of, 358 radiations from, 8SB Tommasina scintillations prodneed by electriAoa- tion, 160 Townsend ione by colliaion, 89, 67 coefficient of recombination, 41 Towneend (conr.) diffosioD of ions, 61 tt $tq. comparison of charge on ion with that on hydrogen atom in electro- lysis, 63 nnmber of molvcnlea per o.c of gas, 64 ionization by collision tor diHereut speeds, 171 TranstormatioDS, i theory ol, 335 ec teg. nomenclatuie of, S3B activity due to, 337 detection of a rayless change in, 341 in uranium, 846 et tq. in thorium, 861 et teg. in aetiniam, 364 tt uq. in radium, 871 et leq. lilt o^ 44» origin ot radium in, 459 helium, a result of, 476 el wg. possible cause of, 486 et teq. appUoation ot, to evolution Of matter, 497 el teq. of excited radio-activity of ntdinm and thorium, 318 it ttq. ot excited radio-activity of si Travera and Itamsay . amount of helium in fergosonite, 4 Troost rays tram hexagonal blende, 4 persiste abeuioe of reflection, reaction and polariiatioD, 7 examination of uranium minerals, 11 relative activity of compounds of nranium, IS nature of radiations from, 109 |9 rays from, 114 a rays from, 141 1 ravB from, 180 separation of Ur X from, 219 recovery of activity of, 219 changes in, 846 et teq. Don-Ksparable activity of, 347 radiations ^m Ur X, 347 el teq. method of measurement ot activity of Ur X, 847 emission ot energy b^, 418 tbeoriaa of radio-activity of, 437 et teq. DiglizedoyGOOglf tbeoiy of ndio-sctive cluuige, 444 *( itq. table of wtive piodnota, 449 imie ot obnnge of, 468 Ufe of. 466 Rkdiiim probable prodoot of, 4G9 <t aw , of ndinm emanation, 461 growth of ladinm la, 468 coDBerration of radiD-activit; of, 46S total emiwioii of eaerg; from 1 gram of, 47S possible oaasee of duintegiation of, 460 et irq. [JraDium X ■eparation of, by Crookes, 319 Beparntion ol, b; Becqoerel, 319 decay of aativity al, 323 recovery of aotiTtt; oF, 239 tbeorji to eipUiD prodactioii of, 324 '( teq. ■129 changeB in, S46 tt itq. radiattone from, 347 tt tig. method of meaaurement of radiatioos from, B4T effect of cryatallisation on aotiiit; of, 849 difFueioD of, 3G0 Velooitj of iona in electrio field, 42 it itq. difference between, of poeitWe and negative iam, 49 tt itq. of ff particle or electron. 136 et leq. vaiiatioD of raua of electron with, 127 of a particle, 146 of tranamiBBion of aotivi^, 320 et of ioDB in atmoaphere, 628 Villard diacovery of y raja from radinm, 179 alteration of X ray screen with time, 206 activi^ produced by oatbode rays. Walker, G. W. theory of electrometer, 90 WallthoB action of radium rays on akin, 216 WallaUbe diflaaion of radium emanation into liqaida, 276 Water emanation from, 610 el itq. decay of activity of emanation from, 611 et leq. Water-falla amoQOt of eioit«d activity produced at Niagara, 620 electrification prodnced near, 620 Walta, Marshall atomic weight of radium, 18 Weicbert velocity of cathode lays, 76 Weight loaa of by radio-elementa. 473 attempta to measure loaa of in radinm, 474 Wbeeler and Bumstead diffasion ot radium emanation, 27S emanation from snrfaoe water and the Boil, 612, 522 identity of emanation from aoil with radinm emanation, Sl'i, 632 Wbetbam effect of valency of ion on oolloidsl Bolutiona, 216 production of ntdiom tioai uranium, 463 Wiedemann tbermo-laminsscenoe, 307 Wiedemann and Bohmidt thermo-lamineeoeace, 207 Wien ot excited value of </ni for eanal raye, 78 poaitive -cbarge of canal raya, 78 amount of charge carried by p raya, 124 Willoock. Miaa and Hardy coloration of iodoform eolation by radinm rayi, 214 WillemitB phoaphoreacence of, under radinm rays, 203 DEe of, to show ooudenaation of emana- tion, 279 Willows and Peek action of radium rays on Ipark, D„t,i.a,Google ti ttq. differenoe tratween positiTe and nega- tive ions as aondeiuAtion nndei, 4S eqnalit; of charges garried b; positive ftod negative ions, 60 eonatmation of eleotroBoope, 86, B6 uatntal ionization of air in vmmIb, 601 616 radio- oetivitj of lOin and snow, 606, Zeeman 606 aetion of magnetic field on light, 77 loss of charge in closed veaselH, 5S1 Zeleny tt leq., 631 velocity of ions, 43 tt itq. preBenoe of ions in dnat-tree air shown diSerenM of velocity of ions, 46 by oondeuMtion, 688 potential gradieat between electrodes, number of ions produced per c.c, 65 388 ~ ■ eBeoC of preBsare and nature of gas on ionization in sealed ve8wla, 634 Wilson, H. A. charge on ion, 61 Wilson, W. E, radinm in snn, 491 canoe of lominosity of, 160, 549 Dig lizedoy Google D„t,i.a,Google D„t,i.a,Google D„t,i.a,Google CABOT SCIIHCE LIBRARY D„t,i.a,Google wmm I ' S55 / See rules in library regarding the v^ff^snwal and return of books. _ " - ■.* rn D„t,i.a,Google D„t,i.a,Google. 