I am marry sbaat $ha poor remltr of thooe two prepsrattonr, rinm I Zeel p$lr to blame. %e nfcotlnamide-ribere linltags I8 very lt~b$lo ta alkali. 3CU& rep~~ta a 50 per eent deetrwtion in 0.1 X B&H at 20 dagrrar after 17 minutea. My ~WR sxperienae enfamacr $hie abrsrvatioa. warn part56llJ. dimiate@ntsd. Z wlll eelid you 81 preparation that ham the fallowing hlrCcr~lt I would guess that $he EMB at pfi 11 ~enoeralng the rlbflarln phorphatr preparation, I oaa give yoa very liO.tle Infiwution 81nUO 14 fm a oommrold produati gr6Qa~d by a rnyn%hetio method. We tomted for ftr Pr. Waldo 1. Oohen -2- 1rebrum-y 24, 1950