*1* rttUWA OUVtN to GHAIKM UON Danckpous Tra I'llK HISTORICAL, SOCIAL.

Air System Equipment Crf/ta?"

Air System Equipment '1L%Ta Hart & Cooley Manufacturing Co.

Heating Systems Boilers, Cast-Iron UnitedStates Radiator (corporation General Oliices; Detroit, Michigan Branches and Sales Oilices in Principal Cities Detroit, Michigan CAPITOL SUNRAY No. 9 SERIES BOILERS For Automatic Firing (Oil, Stoker or Gas) CAPITOL THINTUBE RADIATORS 3-Tube Heights Per Section Heating Surface 25' 1.6SqFt 4-Tube 19* 1.6SqFt 22' 1.8 Sq Ft 25' 2.0SqFt 5-Tube 22' 2.1 SqFt 25' 2.4 Sq Ft Boiler No. 9-4 9-5 9-6 . 9-7 9-8 9-9 Capacity Square Feet Steam 1360 1785 2210 2630 3055 3480 Water 2175 2855 3535 4205 4885 5565 1-B-R Sq Ft Direct Cast Iron Radiation Steam 925 1245 1565 1885 2205 2525 Water 2500 3530 4040 6-Tube 19' 2.3 Sq Ft 25' 3.0 Sq Ft 32' 3.7 Sq Ft *1% in.

The Industrial Press 148 Lafayette Street, New York 13, N.

Heating Systems PuTMps Chicago Pump Company 622 W.

TABLE 46-0 (Concluded) Type ofdust tgnitton temp of dust cloud (degC) Mm spark energy required for ignttion of dust cloud (mxllf joules) Min ex plosive concen tration (oz per 1000 on ft) Mar explosion pressure (pst) Rates of pressure rise (pti per sec) Avg Max Limiting oxygen percentage to prevent ignition of dust cloud by electric sparks Pitch coal tar (58% ml matter) Procaine penicillin Rubber crude hard Seeobartital sodium Soap Sodium alkytarytsutfonate Sodium benzoate Sodium carboxymethyi cellulose Sorbic acid Sulfur Vitamin B, Wood flour 710 20 35 95 1900 6,000 IS 450 25 50} 1 000 2000 350 SO 25 80 1 200 3300 15 520 95 105 55 250 500 430 60 45 85 600 1 750 540 130 ret 400 1 250 560 80 55 85 1.800 10000+ 350 560 150 60 300 600 470 IS 25 90 3000 10 000+ 190 15 35 80 1 700 4 750 11 500 80 105 80 1000 2 250 430 20 40 110 1600 5500 17 From Standard Handbook for Mechanical Engineers, rev 7th ed Edited by T Baumeuter (Copyright 1987 McGrawHill Book Co ) Used by permission When uranium uranium hydride, and zirconium were dispersed into air at room temperature the dust clouds ignited under some conditions tThe oxygen reduction data in this table are based on tests made in air-CO, mixtures Dust clouds of thonum titanium, uranium, zirconium Dowmetal and certain magnesium and magnesium-alloy powders ignited in pure CO, 1 Pressure and rates of pressure rise for these dusts were measured by an older testing technique 1465

Heaters, Water The Whitlock Coil Pipe Company Manufacturers and Engineers Baltimore, Md.

Index to Advertisers Page D. & T.

/ To--Name l> Ooeonmont R.

TUMORS OF THE SKIN 271 nection with the carcinogenesis by roentgen-rays is not only vague, but that it is also insufficient even in the presence of an individual predisposition for a cancerous response.

Friction Products Oivision 'he largest segment at tne A.bex Automotive Grouo. tne Frcnon P'ocucts Division suosues fnct.on materials uses in oraKing cassenger cars, trucks trailers ouses. off-hignway eauiomem ana recreational vehicles, along with aircraft, mass transit trams ano mcustnal macnmery.

State of Ohio The Industrial Commission of Ohio DIVISION OF SAFETY AND HYGIENE 2329 WEST FIFTH AVENUE P.O.

NEG.

Steed?