ihadoccasionoexamineacerainnumberofmineralsafewofhemshowedaciviy;heywerehoseconainingeiheruraniumorhoriumheaciviyofhesemineralswouldhavehadnohingasonishingaboui,ifihadbeeninproporionohequaniiesofuraniumorhoriumconainedinhembuiwasnososomeofhesemineralsrevealedanaciviyhreeorfourimesgreaerhanhaofuraniumiverifiedhissurprisingfaccarefully,andcouldnodoubisruhspecuingabouhereasonforhis,hereseemedobebuoneexpnaionheremusbe,ihough,someunknownsubsance,veryacive,inhesemineralsmyhusbandagreedwihmeandiurgedhawesearchaonceforhishypoheicalsubsance,hinkingha,wihjoinedeffors,aresulwouldbequicklyobainedneiherofuscouldforeseehainbegi

inghisworkwewereoenerhepahofanewsciencewhichweshouldfollowforallourfuure

ofcourse,ididnoexpec,evenahebegi

ing,ofindanewelemeninanyrgequaniy,ashemineralshadalreadybeenanalyzedwihsomeprecisionaleas,ihoughheremighbeasmuchasonepercenofheunknownsubsanceinhemineralsbuhemoreweworked,heclearerwerealizedhahenewradioaciveelemencouldexisonlyinquieminueproporionandha,inconsequence,isaciviymusbeverygreawouldwehaveinsised,despiehescarciyofourmeansofresearch,ifwehadknownherueproporionofwhaweweresearchingfor,noonecanell;allhacanbesaidnowishaheconsanprogressofourworkheldusabsorbedinapassionaeresearch,whilehedifficulieswereeverincreasingasamaeroffac,iwasonlyaferseveralyearsofmosarduousborhawefinallysucceededincompleelyseparainghenewsubsance,nowknownoeverybodyasradiumhereis,briefly,hesoryofhesearchanddiscovery

aswedidnoknow,ahebegi

ing,anyofhechemicalproperiesofheunknownsubsance,buonlyhaiemisrays,iwasbyheserayshawehadosearchwefirsunderookheanalysisofapichblendefromsjoachimshalanalyzinghisorebyheusualchemicalmehods,weaddedanexaminaionofisdifferenparsforradioaciviy,byheuseofourdelicaeelecricalapparaushiswashefoundaionofanewmehodofchemicalanalysiswhich,followingourwork,hasbeenexended,wihheresulhaargenumberofradioaciveelemenshavebeendiscovered

inafewweekswecouldbeconvincedhaourprevisionhadbeenrigh,forheaciviywasconcenrainginaregurwayand,inafewmonhs,wecouldseparaefromhepichblendeasubsanceaccompanyinghebismuh,muchmoreacivehanuranium,andhavingwelldefinedchemicalproperiesinjuly,,wea

ouncedheexisenceofhisnewsubsance,owhichigavehenameofpolonium,inmemoryofmynaivecounry

whileengagedinhisworkonpolonium,wehadalsodiscoveredha,accompanyinghebariumseparaedfromhepichblende,herewasanohernewelemenaferseveralmonhsmoreofcloseworkwewereableoseparaehissecondnewsubsance,whichwasaferwardsshownobemuchmoreimporanhanpoloniumindecember,,wecoulda

ouncehediscoveryofhisnewandnowfamouselemen,owhichwegavehenameofradium

however,hegreaesparofhemaerialworkhadyeobedonewehad,obesure,discoveredheexisenceofheremarkablenewelemens,buiwaschieflybyheirradianproperieshahesenewsubsancesweredisinguishedfromhebismuhandbariumwihwhichheyweremixedinminuequaniieswehadsilloseparaehemaspureelemensonhisworkwenowsared

wewereverypoorlyequippedwihfaciliiesforhispurposeiwasnecessaryosubjecrgequaniiesoforeocarefulchemicalreamenwehadnomoney,nosuiableboraory,nopersonalhelpforourgreaanddifficulunderakingiwaslikecreaingsomehingouofnohing,andifmyearliersudyingyearshadoncebeencalledbymybroherinwheheroicperiodofmylife,icansaywihouexaggeraionhaheperiodonwhichmyhusbandandinoweneredwasrulyheheroiconeofourcommonlife

weknewbyourexperimenshainhereamenofpichblendeaheuraniumpnofsjoachimshal,radiummushavebeenlefinheresidues,and,wihhepermissionofheausriangovernmen,whichownedhepn,wesucceededinsecuringacerainquaniyofheseresidues,henquievalueless,andusedhemforexracionofradiumhowgdiwaswhenhesacksarrived,wihhebrowndusmixedwihpineneedles,andwhenheaciviyprovedevengreaerhanhaofheprimiiveore!iwasasrokeofluckhaheresidueshadnobeenhrownfarawayordisposedofinsomeway,bulefinaheapinhepinewoodnearhepnsomeimeer,heausriangovernmen,onheproposiionofheacademyofscienceofvie

a,leushaveseveralonsofsimirresiduesaalowpricewihhismaerialwaspreparedallheradiumihadinmyboraoryupohedaewhenireceivedhepreciousgiffromheamericanwomen