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562 CHAPTER 53 The refrigeration loads and unit selections may be deter mined by the foregoing methods. bibliography D.

/ Industrial Hygiene Digest - 33 August, 1949 3es Tox. 3d rt iie o- 1 :re hea ind 927 Turpentinea and Dermtltla.

TABLE 29-B MINIMUM CONTROL VELOCITIES (Minimum Air Velocities Recommended for the Capture of Dusts, Fumes, Smokes, Mists, Gases, and Vapors Released at Vanous Types of Operations) Conditions of Generation, Dispersion, or Release of Contaminant Minimum Control Velocity (fpm) Examples of Processes or Operations Released with no significant velocity into relatively quiet air Released with low initial velocity into moderately quiet air Released with considerable velocity or into zone of rapid air movement Released with high velocity or into zone of very rapid air movement 100 100-200 200-500 500-2,000 Evaporation or escape of vapors, gases, or fumes from open vessels, degreasing, pickling, plating Spray paint booths, cabinets, and rooms, intermittent dumping of dry materials into containers, welding Some spray painting in small booths and with high pressure. active barrel or container filling, conveyor loading Grinding, abrasive blasting, surfacing operations on rock From Allen D Brandi A Summary of Design Data for Ezhaust Systems " Heating and Ventilating (May 1945) For circular or square openings, b is es sentially 0 1 and the equation becomes 01(5 Suppose the duct is 6 in in diameter, and the velocity of air in it is 4000 fpm--a com mon situation in dust exhaust systems Since a 6-in diameter circle is 0 196 sq ft in area of cross section, Q = 0 196 X 4000 or 780 cfm (In ducts, 0=AoDuct ) Two inches out from the duct end, t> has fallen from 4000 fpm to 1650 At 4 m from the duct, the velocity is 600, at 6 in away, it is only 290 fpm --barely enough to be felt by the hand Where x is very large compared with A, equation (2) becomes See Table 29-A Flanged hood.

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PLAINTIFF'S EXHIBIT Thetford lines, ^ue July 19, 1945.

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For Attention The RUBEROID Co.

Mellon Institute of Industrial Research 9 U.VI VKHSITV OF PlTTSliUKGH PROGRESS REPORT TV MC ---w Subjects under which report ia to be indexed fdlhM.

FILE NAME: BF Goodrich (BFG) DATE: 1947 DOC#: BFG026 DOCUMENT DESCRIPTION: Trade Journal Article - Why Industrial Hygiene in a Rubber Company (See also #53, out of order) By WILLIAM E.

FILE NAME: Concrete (CONC) DATE: 1949 Nov DOC#: CONC020 DOCUMENT DESCRIPTION: Journal Article - [Silicosis] A New Approach to Pneumoconiosis 1; 5 . r. 2t - *'.' i, ; i : i.

FILE NAME: Gardner Denver (GD) DATE: 1946 Oct DOC#: GD002 DOCUMENT DESCRIPTION: Trade Journal Advertisements - Southern Power & Industry --Booklet -- Be. m ven ien t appli- un inexpensive ml other similar from any mate f m a te ria l, tim 3 0 ., INC'., Many*: -- Spiral-wound ure, resulting ta blenni, no vibre ad maintenance various operai urea, for pip u.-- FU SX ITA Lailey SU ., Cam Oil-- B ulletin-- tion of concento rem ove and i of operating exchangers, of terns.-- AMERL 9 Rockefeller .i tiWMi'i" }i iff j Iji 1 :,:i' i.:` : . ..

FILE NAME: Kohler (KOH) DATE: 1944 DOC#: KOH122 DOCUMENT DESCRIPTION: Roll of Membership - American Society of Heating and Ventilating Engineers 1944 Roll of Membership (Corrected to J a n u a ry 15. 1944 Am eric an So ciety of H eating and v e n t il a t in g e n g in e e r s Published a t th e H eadquarters of the Society 51 M adison Avenue, New York 10, N.

FILE NAME: National Safety Council (NSC) DATE: 1948 Feb DOC#: NSC017 DOCUMENT DESCRIPTION: NSC - National Safety News - Wilson Goggles