878 CHAPTER 40 1952 Guide Sound Control 879 test rating information should be made to arrive at the sound emission of a particular type.

Air System Equipment Refrigerating Machinei, Baltimore Aircoil Company, Inc. 2615 Mathews "Street Baltimore 18, Maryland Manufacturers of Evaporative Condensers and Cooling Towers BALTIMORE FAN COMPANY (A Division of Baltimore Aircoil Company, Inc.)

280 CHAPTER 13 , 1953 Guides Table 10.

378 CHAPTER 15 1953 Guide r tions should be. made in accordance with recommendations shown in the publications of the American Gas Association.

518 CHAPTER 21 1953.Guide Steam Heating Systems 519 Fiq. 47.

592 CHAPTER 26 ,1953 Guide , Fig. 1.

632 CHAPTER 28 1953 Guide Insulation can materially prolong the time required for the water to give up its heat, and if the velocity of the water flowing in the pipe is main tained at a sufficiently high rate, freezing may be prevented.- Table 9 may be used for making estimates of the thickness of insula tion necessary to take care of still water in pipes at various water and. surrounding air temperature conditions.

790 CHAPTER 36 1953 Guide dampers are often closed automatically when the fan is stopped to avoid trouble, caused by very cold outside air drifting.in during ojf periods.

1953 ANNUAL INDEX Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH 13.

96 CHAPTER 5 1954 Guide: Heat Transfer radiation which exists.

192 CHAPTER 9 1954 Guide Table 13.

214 CHAPTER 10 1954 Guide is based on such insulation.

318 CHAPTER 13 1954 Guide tef LETTER SYMBOLS USED IN CHAPTER 13 = fraction of incident solar radiation absorbed, dimensionless; subscripts D, d, andt refer to direct, diffuse and total, respectively.

366 CHAPTER 15 1954 Guide atomization.

440 CHAPTER 18 1954 Guide Table 2.