American Society of Heating and Ventilating Engineers Guide, 1929 HEATING TUNNELS Where steam heating lines are installed in tunnels large enough to provide walking space, the pipes are supported by means of hangers or roller frames on brackets or frame racks at the side or sides of the tunnel.

American Society of Heating and Ventilating Engineers Guide, 1929 Chapter XV--Heat Insulation for Pipes and Surfaces surface whenever its temperature falls to that of the dew point of the surrounding air.

22--Coverings for Pipes'and Hot, Surfaces IP- H.

Air System Equipment Air Filters CORPORATION 25000 Miles Rd.

Air System Equipment Air Filters Research Products Corporation Madison 10, Wisconsin AIR FILTERS FOR HEATING AND VENTILATING Grease Filters for Kitchen Exhaust Systems--Paint Arrestor Pads RP AIR FILTERS Controlled turbulence design is pro vided in every RP filter.

Air System Equipment Somers Corporation 6063 Wabash Ave., Detroit 8, Mich.

MULTIBESTOS HANDBOOK .

FILE NAME: Metropolitan Life (ML) DATE: 1929-1951 DOC#: ML174 DOCUMENT DESCRIPTION: Dr.

The foundation ofmodern sdence and modem Haldane, Henderson and Haggard.

FILE NAME: Colgate (COL) DATE: 1923-1967 DOC#: COL031 DOCUMENT DESCRIPTION: NSC Asbestos Articles - Table of Contents Table of Contents 1923 Williams RC, Health Protection Against Dust and Fumes National Safety News v.7 no.5, pp.13-15, May, 1923. 1928 Greenburg L, Medicine Develops with Industry's Needs 1929 National Safety News v.18 no.2, pp.15-17, August, 1928.

/\ lu Zi ^___`I 1 3M-1682 "\ t ACEMXA FDR VJCJTiTZ CCtfUTTEI ICTTIHG To be held Unr-day* Sove^iber 25th, 1929 at 5:00 P.L, at 25 tall Street.

Asbestos Dust Called a Hazard To at Least One-Fourth of US By JANE E.

Prevention of OCCUPATIONAL DISEASES Other Than Those That Are Caused hy Toxic Dust By R.

c.

MARCUS B.