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T O : K e tte rin g A lu m n i In the past there has been little recognition, outside a very lim ited group chiefly represented in the m em bership of the A m erican Industrial Hygiene A ssociation, of the benefits of application of scientific and technologic m easurem ents and controls in the solution of health-related problem s arising in industry and also in m odern industrial society.

CONFIDENTIAL T tf&Z* THE ASSOCIATED ETHYL COMPANY LIMITED NORTHWICH CHESHIRE te le p h o n e : N O R T H W I C H 3 2 4 1/ 7.

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SaAIHOav TYNOIiVN 3HJ, v aaonaoHdaa / U n ited S tates D epartm ent of BU REAU O F M IN ES CO -O PERATIVE C L IN IC - 7 m 10 00 PICHER, OKLAHOMA 1931 WAR March U, 1931.

REPRODUCED AT THE NATIONAL ARCHIVES (COST) 656 April 9, 1924.

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