702 CHAPTER 32 1954 Guide lengths and mean velocitiesof flow as a circular duct of the same hydraulic diameter.; When duct sizes are expressed in terms of hydraulic diameter, and when equations for friction loss in: round and rectangular ducts are equated: for equal capacity and equal length* ah equation giving the circu lar equivalent of a rectangular duct is obtained5 (Equation 3).

CHAPTER 36 - yrj; .'

$30 CHAPTER 42 ;;k: 1954 Guide (black) types and1 the1 general ^construction 'already-described^ A metal inner liner or reflector,usually) placed between: resistors; and casing, pro vides a secondary) air passage to promote circulation.and'reduce casing surface temperature at the rear.

FOOD SAVERS Delta Heating Carp., 1221 Barnebey-Cheney Co., 1268-1260 Dravo Corp., 1222-1223 __ Connor Engineering Corp., 1272- Jackson A Church Co., 1224 1273, 1378-1379 Cor?

1158 1954 Guide* Pacific Lumber Co., The, 1598 Pacific Lumber Co., The, 1598 LIQUID LEVEL GAGES (S* Sprayo-Flake Insulation Co., 1586 Sprayo-Flake Insulation Co., 1586 Cages, Liquid Level) United States Gypsum Co., 1599 Wood Conversion Co., 1600 United States Gypsum Co., 1599 Wood Conversion Co., 1600 Zonolite Co., 1576 LOUVERS (Also see Grilles, Regis ters) % INSULATION, Low Tempera American Foundry A Furnace Co.,'?

II I: % jl ;f; Si", t' i 40 CHAPTER 3 1955 Guide ts.0. *-. . .

126 CHAPTER 6 -1955 Guides measurable degree the optimum conditions for comfort previously in dicated.

604 CHAPTER 26 1955 Guide heating system exactly balanced to load conditions.

128 CHAPTER 6 1956 Guide tions it may be unpleasant or even harmful.

330 CHAPTER 13 1956 Guide 11 Solar Heat Gain Through Walla and Roofs for CooUng Load Calculations, by J.

434 CHAPTER 17 1956 Guide DETERMINING RESIDENTIAL CHIMNEY SIZES / The flue sizes for small residential chimneys are governed by the National Building Code of the National Board of Fire Underwriters for gas-burning appliances.

522 CHAPTER 21 1956 Guide return connections.

yj; Serving Texas, Oklahoma, Colorado, Kansas, Arkansas, New Mexico and Other Areas In The Rapidly-Growing Southwest With These Transite Asbestos-Cement Products: Press View And Public Opening Friday, June 20,1958 g ^4aESl IfPjlPfeIISllII^ For any further information needed contact Industrial Relations Manager, Johns-Manville Products Corporation, Denison, Texas, or the Public Relations Department, Johns-Manville Corporation, 22 East 40th St., New York 16, N.

938 CHAPTER 40 1956 Guide tion is ended.

1074 CHAPTER 47 1956 Guide independent of temperature, for all temperature ranges.