Document NEVk0r58dvBOjD3BLbkOJrkaE

November 13, 1964 Dr. Harold Karlin 31 Bay State Road Boston 13, Naasaohuaetta . Dear Dr. Karlini Could you find out from your patient which Pydraul ha ia referring to. This ia a generio olaaaifioation for a group of our functional fluids and the Indi viduals vary greatly in composition and physiological aotion. If you oould alao give me eosie idea of the apeoifio problems or effects, Z might be able to anawer you more definitively. Sinoerely, R. Kaaet Kelly, N. D. Nedloal Director RKK'ln MQN6 091166