378 CHAPTER 15 , .1950: Guide ' ' Radiant heaters axe required to have a radiant efficiency of not less than 28 per cent.

512 CHAPTER 22 .1050Quite ing line may not be indicative of the actual beating effect of a radiator in the room.

566 CHAPTER 26 . ' 1950 Guide fitting : standard, and, for 300 lb steel flanges and flanged fittings, than those shown-in the regular American Standards.

626 CHAPTER 30 T950: Guide eah be Alleviated by some vane adjustment, provided an independent means for regulation of static pressure behind the vanes is included.

706 CHAPTER 33 1950 Guide force upon specially shaped blades of an exhauster wheel,' and then conveyed through a dust circuit in the fan casing to the dust storage hopper. 4.

*56 CHAPTER 40 1950 Guide Sound Control 857 Fig. 6.

910 CHAPTER 44 1950 Guide involved that a detailed treatment is beyond the scope of this chapter.

978 CHAPTER 48 1950 Guide Table 1.

198 CHAPTER 9 1951 Guide Table 14.

650 CHAPTER 30 1951 Guide condition whereby two high velocity jets are created along the sides of the duct, or the air spills immediately downward into the occupied zone (see C Fig. 7). 5.

.696 CHAPTER 32 1951.

872 CHAPTER 40 1951 Guide Sound Control 873 Fig. 2.

896 CHAPTER 42 1951 Guide CLASSIFICATION AND CHARACTERISTICS OF WATER For industrial use there is no accepted conventional classification of water.

Air Conditioning * SSjcJSST McQuay, Inc. 1602 Broadway, N.E., Minneapolis 13, Minn.

Air System Equipment Barber-Colman Company ENGINEERED AIR DISTRIBUTION OUTLETS Rockford, Illinois AUTOMATIC TEMPERATURE CONTROL SYSTEMS Quality-built units with directional diffusing fins provide quiet, uniform, draftless air distribution.