Us fo al iin) Rough drawings of both items, along with one model = water accoaipanied the me-orandun. 5 Jan. 43: Memorandum for Vajor DAVER, DCC/34. As the result of technical measurements being conducted by the Chemical Corps, the follering changes were made in the request of 15 October 47: a. b. ce. Increase the number of General Radio counting rate meters, type 1500A, fran 2 to 4, Increase the number of beta counting tubes and the muzber of gamma counting tubes for the abcve instrucent from 3 to 4, Increase the number of Esterline-Angus 5ma recorders from 2 to 4.