494 CHAPTER 23 1949 Guide in order to help in the trap action.

528 CHAPTER 25 1949 Guide line level (approximately 5 ft-0 in. above floor), and temperatures taken at the breath ing line may not be indicative, of the actual heating effect of a radiator in the room.

674 CHAPTER 34 1949 Guide air intake, the fan discharge, the conditioned space or the return air.

706 CHAPTER 36 1949 Guide essential.

772 CHAPTER 39 1949 Guide of the coils, however, is low and'a great deal more surface is required than for any other type of cooler.

Albany, N.

Bends, CoUs, Fittings Arthur Harris & Co. 210-218 N.

Publications Heating and VENTILATING is a monthly publication read by engineers and contractors.

92 CHAPTER 4 1950 Guide where pi * the density of the fluid over the mercury in the manometer. pw = the density of water at 60 F.

244 CHAPTER 11 1950 Guide Heating Load 245 Table 5.

272 CHAPTER 12 1950 Guide Table 14.

446 CHAPTER 20 1950 ,Guide or vapor at sub-atmospheric pressures, and at consequent lower tempera tures.

896 CHAPTER 43 1950 Guide ranted, or when only rough comparisons are desired between several types, approximate unit costs are of value as time savers.

900 CHAPTER 43 1950Guidd An approximation; of the useful life of various items of equipment, and parts of systems is shown in Table 5.

. 940 CHAPTER 46 1950 Guide l!.