Document ZQa7Db4dv9OK4Ok3JKN96b2p

I ELSTON L. BELKNAP. M. D. 2 3 1 W. Wisc o n sin a y e. MILWAUKEE K o v e m b e r IS, 1932 Bob art i-Iekoe, Li. D . , College of i.Iedicine, Cincinnati, Ohio. hear hr. iiehoe: You may remember that I spoke to you after your exceedingly illuminating paper Of O c t o b e r 24, 1932 in Washington, D.C. : I happen to have a moderately large group of battery workers under ny immediate supervision as "'ell as q uite a n u m b e r of r e f e r r e d cases fro m other industries, throughout the state. In one of our local hospitals here we have been examining the 24-hour urine of these cases quantitatively for lead, using the old Lederer method and checking the final lead sulphide color wit h known quantities of lead down as low as .009 mgs. I wonder what you think of this method and lust exactly what method of urine analysis you have been using for your recent studies. Assuring you that I shall appreciate any s u g g e s t i o n s that yo u m a y have to give to me, I am Sincerely yours, 3 L 3 :P W