354 CHAPTER 14 1955 Grid?

\ .Combination i ' .2 3 or 3d 4 or 4d CHAPTER 19 1955 Guide Table 9.

638 CHAPTER 27 1955 Guide used to produce acceptable welds.

660 CHAPTER 28 1955 Guide data on commonly used forms of tunnels and conduit systems, have been published by the National District Healing Association,3 Another form of underground insulation consists of the direct burial of the pipe in a trench with a complete covering of about 4 in. of a granular bitumen which, upon -heating, forms a semiplastic, waterproof covering haying a very good insulating value.

1032 CHAPTER 46 1955 Guide, openings are kept to a minimum size and are placed away from the naturalpath of the contaminant travel wherever possible.

142 CHAPTER 7 1956 Guide providing a -uniform environmental temperature just sufficiently high to keep the body temperature within normal limits.

396 CHAPTER 16 1956 Guide Cast-iron boilers are usually shipped in sections, and assembled at the place of installation.

634 CHAPTER 27 1956 Guide & Table 9.

1012 CHAPTER 44 1956 Guide of operating cost is more difficult because the power required for summer cooling is affected by many factors of a variable nature. , Table 5 gives the equivalent full load operating hours of refrigerating equipment used for summer cooling for the period of May 15th to Octo ber 15th.

1018 CHAPTER 45 1956 Guide Table 1.

1030 CHAPTER 45 1956 Guide Control of Temperature for Close Machining Tolerances Where tolerances must be held within 2 or 3 ten-thousands of an inch, as in the manufacture of precision' instruments, tools, and high quality lenses, temperature variations may cause expansion and contraction of material to an extent that will seriously affect the quality of the work.

1050 CHAPTER 46 1956 Guide Table 5.

iW H'SO CHAPTER 47 1956 Guide Actual dryer operation is somewhat more complicated because even if radiation and conduction losses are neglected, the wet-bulb temperature of the air remains constant only as long as surface evaporation of water is taking place.

284 CHAPTER 12 1957 Guide Notes for Table 8.

410 CHAPTER 16 1957 Guide are considered consistent with good practice, although there are boilers which have high efficiencies and also operate at higher transmission rates.