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* 3* rl&. y ,i-A% >,* ^ Chewing GxjmMa nuf a ct ur er s WR.IGLEYBUILDING -4-10NORTHMICHIGANAVENUE SS8tt hi Tan. 6, 1936 Robert A. Kehoe, M.D., College of Medicine, University of Cincinnati, Eden Avenue, Cincinnati, Ohio. Dear Dr. Kehoe: You are quite right in assuming that we were pleased with the analyses which accompanied yours of the 28th ult. For your confidential information, sample #3644-3, which contained 48.0 parts of " I " , was the one we anticipated would be high. Even though we were using only about 1/2 of 1fo of such material up to the time that the MZ " question came up, yet early in December we permanently discon tinued the use of such material. Samples #3687-3 and #3711-S, which contained 6.1 and 4.7 parts of "X1* respectively, represent material which had been recovered from the filter press screens and cakes. Y7e have also dis continued the use of this material. After eliminating these three samples, you will appreciate that the rest show a comparative ly low "X" content, and, therefore, on the whole, we feel gratified with the results. On the 3rd inst. we sent 3>-ou a new lot of samples, a report on which is to go through the regular channel. Inasmuch as the Wrigley Company is bearing half of the total expense of all work done by your office, I trust you will keep this matter in mind when assigning analytical work for the chewing gum in dustry to your laboratory. Yours very truly, v N N7560 Peppermint Chewing Beech Nut Pack Lot c October 22* 1935 Code 88-89 As packaged AnalNo3SA"3>562 Lead 0.80 p.p.m, Semple from same lot chewed 1 hour . The result on the sample of chewed gum 1 based upon the original weight. V .. :. :' . These analyses show a decrease in the lead after Chewing for one hour. The homogeneity of the sample can be relied upon because the two samples were taken from the same box of chewing gum. In the case of the chewed sample of gum chicle (1 c) we expected a drop In the lehd content but the lack of homogeneity of the sample defeated the purpose of the experiment#