138 CHAPTER 6 1946 Guide Table 18.

T able 1. emperature and D raft in 9 in . by 9 in .

514 CHAPTER 28 1946 Guide ' '' PIPE INSULATIONS Pipe insulations are of several general' forms and are made of various . types of material.

854 CHAPTER 47 ' 1946 Guide.

S^^S!

*x ''jT-''* 62 ..

. 268 CHAPTER 15 " '1948 Guide Table 10.

280._________________________________________________ CHAPTER IS___________________________ 1948 Guide .

558 _____________________ CHAPTER 30 1948 Guide ^ ELECTRIC BOILERS Steam or hot water generating boilers using electric energy are entirely automatic and are well adapted to intermittent operation. - Small electric boilers usually have heating elements of the enclosed metal resistor type immersed in the water.

698 CHAPTER 39 1948 Guide large compressors the loss in volumetric efficiency would more than offset any gain, and the capacity would be reduced.

840 CHAPTER 46 ,1948.

, Chapter 41 Air Duct Design.

100 CHAPTER 10 1949 Guide' of dust prevalent in outdoor air or produced by dusty processes, since the latter predominate in the range of 0.1 to 10 microns in size.

232 CHAPTER >13 1949 Guide' 17 Performance in Relation to Environmental Temperature, by L.

358 CHAPTER 17 1949 Guide air is pumped as a spray through the nozzle at a pressure of 2 to 7 psi, i Secondary air is supplied by a fan.