▁with ▁the ▁Vienna ▁Circle . ▁He ▁also ▁wrote ▁on ▁the ▁found ations ▁of ▁mathematics ▁where , ▁along ▁with ▁Hermann ▁W ey l ▁and ▁O sk ar ▁Be cker , ▁he ▁was ▁attempting ▁to ▁apply ▁the ▁phenomen ology ▁of ▁Edmund ▁Hus ser l ▁to ▁construct ive ▁mathematics . ▁ ▁In ▁ 1 9 3 8 , ▁the ▁conditions ▁for ▁Jewish ▁sch ol ars ▁became ▁too ▁hard ▁and ▁he ▁left ▁for ▁the ▁USA . ▁There ▁he ▁taught ▁until ▁his ▁death ▁as ▁a ▁law ▁professor , ▁in ▁the ▁Gr adu ate ▁Fac ulty ▁of ▁the ▁New ▁York ▁School ▁for ▁Social ▁Research . ▁Kauf mann ▁also ▁a ided ▁fellow ▁Aust rian ▁em ig res ▁in ▁need ▁of ▁assistance ▁during ▁the ▁pre - war ▁years ▁when ▁the ▁situation ▁became ▁dire ▁for ▁Jewish ▁academ ics ▁and ▁sch ol ars ▁in ▁Germany ▁and ▁Austria . ▁Inter ced ing ▁on ▁Karl ▁Po pper ' s ▁beh alf , ▁Po pper ▁was ▁offered ▁academic ▁hospital ity ▁at ▁Cambridge ▁University ▁and ▁a ▁st ip end ▁of ▁£ 1 5 0 ▁for ▁one ▁year ▁- ▁this ▁offer ▁was ▁transfer able , ▁and ▁Friedrich ▁Wa ism ann ▁took ▁it ▁up ▁when ▁Po pper ▁went ▁to ▁New ▁Zealand ▁instead ▁( see ▁John ▁Wat kins ▁in ▁Pro ceed ings ▁of ▁the ▁British ▁Academy , ▁ 9 4 , ▁ 6 4 5 - 6 8 4 , ▁ 6 5 2 ). ▁ ▁In ▁ 1 9 3 6 ▁he ▁produced ▁a ▁book ▁on ▁the ▁method ology ▁of ▁the ▁social ▁sciences ▁( K auf mann ▁ 1