510 CHAPTER 21 1951 Guide Hence, if 1 in. pipe is used, the friction of the circuit will be 45 X 46, or 2070 milinches, and if 11 in. pipe is used, the friction will be 50 X 12, or 600 milinches.

582 CHAPTER 26 1951 Guide Fittings for copper pipe of IPS dimensions are available in screwed or soldered types of connection.

798 CHAPTER 36 1951 Guide Rotary Compressors In recent years rotary compressors, usually hermetically sealed, have become quite popular for fractional tonnage applications and are being designed in increasingly larger sizes.

864 .

990 CHAPTER 47 1951 Guide In addition to extreme speed and accuracy which are required of all air craft temperature controls, they must be able to operate under great ex tremes of temperature, pressure and humidity, and also withstand contin uous extreme vibration.

70 CHAPTER 4 1952'Guide where ' JVk. = Reynolds number.. p =; the density in pounds per cubic foot. ii = the absolute viscosity in pounds per foot-second.

86 CHAPTER 4- 1952 Guide formed between the float and inside wall of the tube: :At' any* particularrate of flow, the float assumes a-definite position in the tube, its location1 being indicated by means of a calibrated scale on the tube.

244 CHAPTER 11 1952 Guide as the outside temperature.

516 CHAPTER 21 1952 Guide Table 3.

686 CHAPTER 31 1952 Guide 5.

740 CHAPTER 33 1952 Guide Count and Discoloration Methods of Testing Air Filters, by F.

76 CHAPTER 4 1953 Guide solid and partly broken) of Fig. 6 is found.

270; CHAPTER 13 1953 Guide Table 2.

352 y.

408 CHAPTER 16 1953 Guide Radiant heaters are required to have a radiant efficiency of hot less than 28 percent.