CC:   Dr. J. E. Booge
                                                         2 Extra Copies
         CLASSIFIED-CONFIDENTIAL
                                                         Newport, Delaware
                                                         June 18, 1942
   
CONFIDENTIAL

MR. M.L. HANAHAN
NEWPORT

                AVAILABLE SAMPLES OF PURE SILICON 

       The following amounts of pure silicon are available for
delivery to Dr. Seitz.  These samples have been made with Stauffer
C.P. silicon tetrachloride, redistilled in our laboratory, and
Bunker Hill slab said to be 99.99+% zinc metal.  The standard
procedure outlined in a separate letter was followed in all steps
except as indicated in the notes.

       Code    Weight               Notes

       RZ 7    11.1g        Some fuzz included Baker's C.P. Zinc
       RZ 12   11.6         Only 100g. zinc used.
       RZ 13   21.5
       RZ 14   21.6
       RZ 15   18.8
       RZ 16,
        17, 18               Combined for treatment, varying temp.
       RZ 20B  128.5         Large reactor.
       RZ 20D   24.7         Large reactor, some fuzz.

                                  [signed initials]
                                     K. H. BUTLER
                                   RESEARCH DEPARTMENT
KHB/MAW