314 CHAPTER 13 1956 Guide conditions and quantity of air supplied to the space.

336 CHAPTER 14 1956 Guide of the domestic, commercial and industrial type.

422 CHAPTER 17 1956 Guide FACTORS AFFECTING NATURAL DRAFT As indicated in both Equations 1 and 2, the theoretical natural draft is directly proportional to the height of the flue and is dependent upon the absolute mean temperature.of the gases within the flue.

742 CHAPTER 32 1956 Guide Air Duct Design 743 noted, however, that absolutely reliable dynamic loss coefficients are not yet available for all duct elements and-that; the information available for pressure losses due to area changes is generally restricted to' symmetrical area changes.

;774 CHAPTER 33 1956 Guide time.

816 CHAPTER 35 1956 Guide tion in performance.

3&STWALL GYPSUM COMPANY Srdmora October 27, 1958 Paoli Laboratory Mr.

,4mmwv 20 1955 coNNAmi or &mum m?

THE NEW ORDER IN LATHING AND PLASTERING An Age-Old Handcraft Joins the Moderns -fcr A special report on the Progress of Machines, Tools and Equipment in the Industry {I Reprinted from PLASTERING INDUSTRIES, November 1957 SGP 0003028 A new horizon bids to make the oldest craft the most modern in the construction industry T is appropriate, we feel, that this I National Convention issue of PLASTERING INDUSTRIES should devote its theme to the mechaniza tion of the lathing and plastering craft--along with the many pages devoted to chronicling the accomp lishment of the CPIA and the Bureaus and Institutes across the land.

Form BCIS4 SON 6 JT phimtsb mu.* a.

GYPSUH PRODUCTS KAFUAL Chapter 7 CRUSH1"D ROCK FOR PORTLAND CLIENT MANUFACTURE Tremendous quantities of crushed gypsum rock are used to retard the setting time of Portland Cement.

426 CHAPTER 19 1950 Guide Register and Grille Openings Supply registers located in the floor require attention to keep them clean and are usually avoided.

482 CHAPTER 20 1950 Guide Steam Heating Systems and Piping 483 Fig. 47.

516 CHAPTER 23 1950 Guide U = 0.81 t. + 0.135 [Vv 1a - (Vv - 1.40) 4], where to -- operative temperature, Fahrenheit degrees. 4> = mean radiant temperature, Fahrenheit degrees. 1a = air temperature, Fahrenheit degrees. 1. = mean skin temperature, Fahrenheit degrees.

630 CHAPTER 30 1950 Guide obtrusive means of distribution is desired, and where it is desirable to submerge the outlets into the room decoration and to minimize the effect of obstructions in the line of discharge.