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SILVERMAN-HUSAIN--NITROGEN OXIDE-ARC WELDING 137 Our interest in this problem has been stimulated by many results obtained in sampling gases from welding atmospheres in industry.

360 INDUSTRIAL HYGIENE AND OCCUPATIONAL MEDICINE The sizes of the particles are given throughout as equivalent impaction diameters (imp. eq.), these being the diameters multiplied by the square root of the specific gravity of the material.4 5 Estimates of their sizes were made in one or more of the following ways: (1) polarization of scattered light,58 (2) the pattern of the colors produced when white light was passed through a cloud of particles,5b (3) "impaction"6 7and (4) microscopic observations.

508 INDUSTRIAL HYGIENE AND OCCUPATIONAL MEDICINE of the dust to be picked up in bursts rather than in a smooth, continuous fashion.7 It also prevented "caking" on the walls surrounding the Venturi jet.

592 HEINZ SPECHT forced to recede from the wick in order to carry a sufficient quantity of oxy?

m T.

.4. it. .1. .tm tarts at IXl'i STKI.lt.

"ts 184 ASBESTOS-DUST EXPOSURES--ENTERLINE & KENDRICK different states were involved in the death certificate search.

1 Corning considered its responsibility to test the Page 1077 j 2 fiberglass before they marketed it to determine if j 3 there was any health hazard?

Page 1073 - 1 Q Did he deal with public relations for the 2 company?

V - |(i I3^3 Note to Uenbers: Xx^ce ^V:/ ^'^>rrr^y Here are the Proceedings for the fourth fall meeting of Air Hygiene Foundation.

NEG.

NEG.NO.

This will elaborate upon our brief discussion on March 18th concerning imputed corporate knowledge of the relationship between ' inhalation of asbestos and development of a disease known as ashes- tosis

EIGHT BORN MONTSLLO, WSCONSIN, NOV. 7, 1865 . . .