KHB                                      CC:   Mr. M. L. Hanahan
                                               Dr. C. M. Olson
                                               Dr. F. Seitz
                                               Mr. E. Lewis
            CLASSIFIED-CONFIDENTIAL
                                                      Newport Delaware
                                                      August 21, 1942

                        SILICON NOW ON HAND

                     ZINC - BUNKER HILL 99.99%

Code          Treatment             Wt.-Gms.           Notes

RZ 26-28*  Dry; HCl                  106.0 ) RZ 26-28 comp. divided after
                                           ) HCl treatment - A portion,
RZ 26-28A* Dry; HCl; H2SO4 + HF       75.5 ) RZ 26-28A  HF treated.

RZ 29B*    Dry; HCl                   38.0     

RZ 29C     H2SO4; H2SO4 + HF          16.0

RZ 32*     H2SO4; HCl                133.8   Contains white particles.
                                             Possible cement from end
                                             plates.

RZ 33*     H2SO4; HCl                 44.8
 
RZ 37A     H2SO4; H2SO4 + HF          12.3 )
                                           )
     B          "     "     "         29.0 ) Contains small pieces
                                           ) silica - derived from
     C          "     "     "         10.5 ) broken tubing.
                                           )
     D          "     "     "         39.9 )     

RZ 38*     H2SO4; H2SO4+HF;H2SO4;HCl  57.0

RZ 39*       "     "     "     "      39.2

RZ 40*     H2SO4; HCl                 50.4

RZ 41*       "     "                  52.2 
                      TOTAL          704.6 gms.


        * Small samples have been retained.


ER: