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P LA IN TIFF 'S E X H IB IT CONTENTS Officers of the National Safety Council 1961*62................ ............................

volume 20 PLAINTIFF'S EXHIBIT NSC-225 national Safety Congren Tranjactionj PUBLIC UTILITIES runOTML SAFETY COUflCIL 425 North Michigan /Ivenue , Chicago.

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812 OCCUPATIONAL TUMORS AND ALLIED DISEASES the antibody; 2. by a proper spatial distribution such that corresponding active points of antigen and antibody can come in apposition simultaneously; and 3. by the accessibility of the active points of the determinant groups to the anti body, owing to the absence of any large inactive group that would prevent or obstruct this approach.

PRODUCED BY FORD 202 H.

134 INDUSTRIAL HYGIENE AND OCCUPATIONAL MEDICINE SUMMARY The responses to exercise of 100 normal controls and of 41 patients with definite evidence of serious cardiac or pulmonary disease were studied.