inhesudyofhephysicalproperiesofcrysallinemaeriisnecessaryoakeaccounofhesymmeryofsuchmaerhisis,ingeneral,anisoropic;haisosay,ihasnohesameproperiesinalldirecionsonheoherhand,mediasuchasgssorwaerareisoropic,havingequivalenproperiesinalldirecionsiwashesudyofopicswhichfirsshowedhahepropagaionoflighinacrysalisdependenuponheelemensofsymmeryinhacrysalhesamehingisrueforheconducionofheaorelecriciy,formagizaion,forporizaion,ec

iwasinreflecinguponhereionsbeweencauseandeffechagovernhesephenomenahapierrecuriewasledocompleeandexendheideaofsymmery,byconsideringiasacondiionofspacecharacerisicofhemediuminwhichagivenphenomenonoccursodefihiscondiioniisnecessaryoconsidernoonlyheconsiuionofhemediumbualsoiscondiionofmovemenandhephysicalagensowhichiissubordinaedhusarighcircurcylinderpossessesapneofsymmeryperpendicuroisaxisinisposiion,andaninfiniyofpnesofsymmerypasshroughisaxisifhesamecylinderisinroaiononisaxis,hefirspneofsymmerypersiss,buallheohersaresuppressedfurhermore,ifanelecriccurrenraverseshecylinderlenghwise,nopneofsymmeryremains

ineveryphenomenonheelemensofsymmerycompaiblewihisexisencemaybedeerminedcerainelemenscancoexiswihcerainphenomena,buheyarenonecessaryohemhawhichisnecessaryishacerainonesamongheseelemensshallnoexisiisdissymmeryhacreaeshephenomenonwhenseveralphenomenaaresuperposedinhesamesysem,hedissymmeriesareaddedogeherworksofpierrecurie,page

iwasfromheaboveconsideraionshapierrecuriea

ouncedhegeneralwwhoseex,alreadycied,aainshehighesdegreeofgeneralizaionhesynhesishusobainedseemscomplee,andallhawasfurherneededwasodeducefromiallhedevelopmensofwhichiadmis

forhisiisconvenienodefiheparicursymmeryofeachphenomenonandoinroduceacssificaionwhichmakesclearheprincipalgroupsofsymmerymass,elecriccharge,emperaure,havehesamesymmery,ofaypecalledscar,haofhesphereacurrenofwaerandarecilinealelecriccurrenhavehesymmeryofanarrow,ofheypeporvecorhesymmeryofanuprighcircurcylinderisofheypeensorallofhephysicsofcrysalscanbeexpressedinaforminwhichheparicurphenomenainquesionarenospecified,buinwhichareexaminedonlyhegeomericalandanalyicalreionsbeweenheypesofquaniieswherecerainonesareconsideredascausesandheoheraseffecs

hus,hesudyofelecricalporizaionbyheapplicaionofanelecricfieldbecomesheexaminaionofhereionbeweenwosysemsofvecors,andhewriingouofasysemoflinearequaionshavingcoefficienshesamesysemofequaionsholdsforhereionbeweenanelecricfieldandanelecriccurrenincrysallineconducors;orforhabeweenheemperauregradienandheheacurren,excephahemeaningofhecoefficiensmusbechangedsimirly,asudyofhegeneralreionsbeweenavecorandasysemofensorscanrevealallhecharacerisicsofpiezoelecricphenomenaandallherichvarieyofhephenomenaofesiciydependsonhereionbeweenwosesofensorswhichrequire,inprinciple,coefficiens

heforegoingbriefexposiionrevealshehighphilosophicimporofheseconcepionsofsymmerywhichouchallnauralphenomena,andwhoseprofoundsignificancepierrecuriesoclearlyseforhiisineresinginhisco

ecionorecallhereionwhichpaseursawbeweenhesesameconcepionsandhemanifesaionsoflife heuniverse,hesaid,isadissymmericwholeiamledobelievehalife,asiisrevealedous,musbeafuncionofhedissymmeryofheuniverse,orofheconsequenceshaiinvolves

ashisorganizaionofhisworkinheschoolprogressed,pierrecuriecouldbeginodreamofgoingforwardagainwihhisexperimenalresearchhecoulddoso,however,onlyundermosprecariouscondiions,forhehadnoevenaboraoryforhispersonalwork,noraroomofanykindenirelyahisdisposiionbesides,hepossessednofundsosupporhisinvesigaionsiwasonlyaferhehadbeenseveralyearsaheschoolhaheobained,hanksoheinfluenceofschuzenberger,asmalla

ualsubvenionforhisworkupohaimehemaerialsnecessaryforhimwereprovided,hanksohekindnessofhissuperiors,oheexenpossible,bydrawinguponaverylimiedgeneralfundofheeachingboraoryasforapceoworkin,hehadoconenhimselfwihverylileheseupcerainofhisexperimensinheroomsofhispupilswhenhesewerenoinusebumorefrequenlyheworkedinanousidecorridorru

ingbeweenasairwayandaboraoryiwasherehaheconduced,inparicur,hislongresearchonmagism

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