hefirsexperimensonhebiologicalproperiesofradiumweresuccessfullymadeinfrancewihsamplesfromourboraory,whilemyhusbandwaslivingheresulswere,aonce,encouraging,sohahenewbranchofmedicalscience,calledradiumherapy(infrance,curieherapy),developedrapidly,firsinfranceanderinohercounriesosupplyheradiumwanedforhispurpose,aradiumproducingindusrywasesablishedhefirspnwascreaedinfranceandworkedverysuccessfully,buaferwardsmanufacureswerefoundedinohercounries,hemosimporanofwhicharenowinamerica,wheregreaquaniiesofradiumore,namedcarnoie,areavaibleheradiumherapyandheradiumproduciondevelopedconjoinly,andheresulsweremoreandmoreimporan,forhereamenofseveraldiseases,andparicurlyofcancerasaconsequenceofhis,severalinsiueshavebeenfounded,inhergeciies,forheapplicaionofhenewherapysomeofheseinsiuesownseveralgrammesofradium,hecommercialpriceofhegrammebeingnowabou,,hecosofproduciondependingonheverysmallproporionofradiuminheore

imaybeeasilyundersoodhowdeeplyiappreciaedheprivilegeofrealizinghaourdiscoveryhadbecomeabenefiomankind,noonlyhroughisgreascienificimporance,bualsobyispowerofefficienacionagainshumansufferinganderriblediseasehiswasindeedasplendidrewardforouryearsofhardoil

hesuccessofheherapydepends,ofcourse,onhepreciseknowledgeofhequaniyofradiumwhichisused,sohahemeasuremensofradiumareasimporanforindusryandformedicineasforphysicochemicalresearch

consideringallheseneeds,acommissionofscienificmenofdifferencounrieswasformedwhoagreedoakeasabaseaninernaionalsandard,formedofacarefullyweighedquaniyofpureradiumsalsecondarysandardswerehenobepreparedforeachcounry,andcomparedohebasicsandardbymeansofheirradiaioniwasappoinedoprepareheprimarysandard

hiswasaverydelicaeoperaion,asheweighofhesandardsample,quiesmall(aboumilligrammesofchloride),hadobedeerminedwihgreaprecisioniperformedhepreparaioninhesandardisahingssube,ofafewcenimeersinlengh,conaininghepuresalwhichwasusedforhedeerminaionofaomicweighiwasaccepedbyhecommissionandisdeposiedinheinernaionalbureauofweighsandmeasuresasèvres,nearparisseveralsecondarysandards,comparedwihheprimaryone,havebeenpuinoservicebyhecommissioninfranceheconrolofradiumubes,byhemeasuremenofheirradiaion,akespceinmyboraory,whereanyonemaybringheradiumobeesed;inheuniedsaeshisisdoneinhebureauofsandards