PROCEEDINGS OF THE National Safety Council FOURTH ANNUAL SAFETY CONGRESS HELD AT THE BELLEVUE - STRATFORD HOTEL Philadelphia, Pa.

DISEASES OF THE BLOOD FORMING ORGANS 585 There is only one case on record for which the claim is made that a pre ceding trauma was the cause of a polycythemia which appeared afterwards (Zadek).

752 OCCUPATIONAL TUMORS AND ALLIED DISEASES of some specific or nonspecific endogenous or exogenous factor (solar rays, roentgen-rays, tar, and arsenic) during the postfetal period of life (Nemenow; and Koelsch).

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A REVIEW AND EVALUATION Of CARCINOGENICITY STUDIES IN MICK AND RATS AND MUTAGENICITY STUDIES WITH POLYCHLORINATED BIPHENYLS yt G*or?

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15101 Rules and Regulations r Title 29--LABOR Chapter I--National Labor Relations Board PART 102--RULES AND REGULATIONS, SERIES 8 Subpart I--Service and Filing of Papers Proof of Service Section 102.112 is amended to read as 3.follows: u- 102.112 Same; by parlies; proof of - service.

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[AMERICAN NATIONAL] ^STANDARD** ASTM C 428 - 80 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St., Philadelphia, Pa. 19103 Reprinted from the Annual Book of ASTM Standards, Copyright ASTM If not listed in the current combined index, will appear in the next edition.

ORDER BLANK American Society for Testing and Materials 1916 Race St., Philadelphia, Pa. 19103 Gentlemen: Dote.

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