Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL JANUARY, 1953 (VoL 17, No. 1) INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH 13, PA.

434 CHAPTER 18 1954 Guide opening of windows, abnormal heating of the building, poor design of heat ing system, sun effect, and other variations.

490 CHAPTER 21 1954 Guide The control valve may be of the automatic modulating or floating type governed thermostatically from selected control points in the building, or it may be a special pressure reducing valve which will maintain the desired sub-atmospheric pressures by continuous flow into the heating main.

CHAPTER 25 1954 Guide s -Unit Heaters and Unit Ventilators 576 577 eral classifications.

CHAPTER 32 1954 Guide 7/z2a8 than that at which the test was conducted, a correction should be made.

1050 .

1112 CHAPTER SI 1954 Guide the observed relative humidity by the ratio of the observed to the standard atmospheric pressure.

Automatic Gas Equipment Co., 1230 Bryan Steam Corp-, 1447 E.

118 CHAPTER 6 1955 Guide Table 3.

176 CHAPTER 9 1955' Gui employed in building construction, the radiation and convection-conduc tion components may vary independently of each other.

462 CHAPTER 19 1955 Guide Table 7.

490 CHAPTER 21 1955 Guide Steam Heating Systems I ' 491 range of the average vapor system.

556 CHAPTER 23 1955 Guide in factory buildings.

.854 CHAPTER 37 1955 Guide #' Table 3.

Operation and Maintenance of Water Distribution Systems* THE GENERAL SCOPE of the term water distribution system is very broad and would normally in clude distribution mains, valves, hy drants, service connections, meters, booster pumping stations, storage fa cilities. maintenance shops, etc.