506 CHAPTER 21 1954 Guide Notes on Vacuum Systems. 1.

i.p.

470 CHAPTER 20 1955 Guide in a rectangular duct should be at least one-half the duct dimension in the plane of the turn.'

678 CHAPTER 30 1955 Guide ally, the heat is supplied by means of hot water or steam.

828 CHAPTER 36 1955 Guide I' the thermal valve and is discharged against the end plug in which the indi vidual liquid feeds are closely arranged.

1094 CHAPTER 48 1955 Guide Report on Relative Performance of Air Filters, by Mechanical Division, Association of American Rod- roads, January 15, 1938.

To: From: Coph Subject: R.

156 CHAPTER 8 1956 Guide pally from industrial plants, accumulating during periods of exceptionally prolonged meteorological inversion and fog, contributed to the illness of many persons, and to the death of some who were especially susceptible.

168 CHAPTER 9 1956 Guide e = emissivity; the ratio of the total radiant flux emitted by a surface to that emitted by an ideal black body at the same temperature.

436 CHAPTER 17 1956 Guide greater in the horizontal passages in the heating plant, the breeching, and the smokepipe, than in the vertical chimney liner.

584 CHAPTER 24 1956 Guide temperature drop is used in determining water flow rates, and a total pump head of more than 30 ft is undesirable due to noise caused by high water velocity.

686 CHAPTER 30 1956 Guide and humidity.

842 CHAPTER 36 1956 Guide U = overall coefficient of heat transfer, Btu per (hour) (square foot of external coil surface) (Fahrenheit degree temperature difference between the fluid within the coil and the air flowing over the coil).

872 CHAPTER 37 1956 Guide designed to operate with reasonable efficiency at capacities as low as 20 per cent of normal load.

1016 CHAPTER 45 1956 Guide Table 1.