PLAINTIFF'S EXHIBIT Dr.

7toa*T7 4,1033 2 asbestos most commonly encountered is designated as chryBOtHe and is one of the four varieties of the mineral serpentine, in which it usually occurs in seams.

CANCERS OF THE RESPIRATORY SYSTEM 393 lung cancer had been exposed to noxious types of dust during their work (quartz, gold ores, copper ores, tin ores, and coal).

1 MR.

NEG.NO.

NEG.

NEG.

PLAINTIFF'S EXHIBIT 3A/M OCCVPATIOXAL CAXCER Of the Urixary Bladder in Dyestuffs Operatives axd of the Luxe. tx Asbestos Textile Workers axd Iron-Ore Mixers CEORGIAXA M.

Report on Effects of Asbestos Dust on the Lungs and Dust Suppression in the Asbestos Industry.

2*^6 Twenty-third Annual Safety Congress--Xationat Safety Council Tlic act in its present imn was irassed in 1923 and served to dear the situation which had Uromc ine lived hv the lic-iip nt large stuns of numcj- in reserve funds against possible future daims ly nun adjudged silicotic previously, hut who Iiad since Itn'it |m sight of or who were carrying on at work showing a minimum or iin disability.

AMERICAN POTASH fc CHEMICAL CORP.

454 OCCUPATIONAL TUMORS AND ALLIED DISEASES the occurrence of a malignant disease requiring an exposure time of con siderably more than io years is not eradicated within 3 years by the mere installation of an improved ventilation system in the mines.

Safe Practices Pamphlet No. 64 Respiratory Protective Equipment Published by National Safety Council, Inc. 20 North Wacker Drive, Chicago 6 1.

throughout. ii'o symptoms o?

1 distributed.