324 CHAPTER 13 1952 Guide slightly in mild weather, and should be shaken only until the first red particles drop from the grates in cold weather.

428 CHAPTER 17 1952 Guide "deg below 65 F.

574 CHAPTER 25 1952 Guide Fig. 2.

654 CHAPTER 30 -1952 Guide 'can be alleviated by some vane adjustment, provided an independent means for regulation of static pressure behind the vanes is included.- Vertical Drop and Rise .' / .' .] ,''7, :The distance that thelower edge of the air stream drops below the bottom of the outlet is important, since the air stream should not reach the occupied' zone until the velocity has fallen to. about 50 fpm. : The drop: (H, feet), is influenced by two forces; the natural vertical spread of. the stream and;the gravitational force due to the difference in density between supply air- and room air.

822 CHAPTER 36 1952 Guide I "condenser.

974 CHAPTER 46 1952 Guide /- At: = total heat transfer coefficient, Btu per (hour) (square foot) (Fahrenheit degree)

278 CHAPTER 13 : 1953 Guide Table 9.

314 CHAPTER 13 1953 Guide.

608 CHAPTER 27 1953 Guide ,,X tubing that has been deoxidized is used.

748 CHAPTER 34 1953' Guide vapor exists in the air, the dry filter, if it is of the cleanable type, may be; troublesome, since grease tends to make it difficult to clean. .Most dry; types, however, employ a throw-away type of medium which; is held in. permanent metal frames so that the difficulty of cleaning the medium is avoided.

754 CHAPTER 34 1953 Guide the fan inlet, and elimination is effected largely on the fan blades and also on the sur faces beyond.

980 CHAPTER 45 1953 Guide Air Conditioning Requireinients for Workers in Factories, by H.

Air System Equipment acS?

Twdustrizl Hygiene Digest April, 1957 | NDUSTRIA L Hygiene Features Biological data which represents the correlated contributions of more than 4,000 scientists and the counsel of an additional 13,000.

Copyright 1954 BY The American Society of Heating and Ventilating Engineers AND BY IT Dedicated To the Advancement of The Profession and Its Allied.Industries TEXT AND ILLUSTRATIONS ARE FULLY PRO TECTED BY COPYRIGHT AND NOTHING THAT APPEARS MAY BE REPRINTED EITHER WHOLLY OR IN PART WITHOUT SPECIAL PERMISSION.