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1. Peference is made to your infornal menorandym dated 4 March 1952 referring to thisdfice literature from the

2. I am attaching a copy of 's memorandum dated 5 December 1951 to which is entiraly self-explanatory. Your attention is invited to the fact that made a very carefui examination of the instruments in question and his comments are set forth in his memorandum.

3. If you have no further use for the literature, I would appreciate it if you would return it to this office whore we can place it in our technical files.

A

Lee t s fd  teh 2.

ATB, 1, 44/44

5 March 1952

Descriptive Literature.