674 CHAPTER 31 1951 Guide velocities.

120 CHAPTER 6 1952 Guide 20 lb packs under a wide range of. environmental conditions which were rated as relatively easy, difficult, and impossible, on the basis of the physiological reactions of the subjects at the end of the 4-hr period as shown in Table 3 and Fig. 3.; Recognition of the need of air conditioning for workers in hot industries is growing rapidly.

122 CHAPTER 6 1952 Guide EFFECTIVE TEMPERATURE INDEX AND COMFORT ZONES There is no precise physiologic observation by which comfort can be evaluated.; Mean skin temperature offers some promise.

294 CHAPTER 12 tv 1952 Guide Table 22.

420 CHAPTER 16 1952 Guide draft hood when burning gas at the manufacturer's rating and which may, therefore, be connected to Type B vent piping.

728 CHAPTER 33 1952 Guide "in boiler plants as a means of smoke abatement.

736 CHAPTER 33 1952 Guide high voltage type have been used for the control of hazardous materials, and for nuisance abatement.

778 CHAPTER 35 1952 Guide Table 1.

780 CHAPTER 35 1952 Guide cooling and dehumidification, the logarithmic difference does not apply strictly, and such problems should be handled as described in a later section on Performance of Dehumidifying Coils.

834 CHAPTER 37 / '' 1952 Guide ABSORBENTS Any absorbent substance may be used as a dehumidifying agent if it has' a vapor pressure with respect to water lower than the partial pressure of the water vapor in the mixture from which the moisture is to be removed.

1028 CHAPTER 48 1952 Guide' Fig. 9.

/' 58 CHAPTER 3 1953 Guide ' 20,270 - A, 0.003164 - W, 1 Aj - 0.668 ~ W, - 0.000630 " 4 from which As = 16.350 and W. = *0.002657.

376 CHAPTER IS 1953 Guide Secondary air is drawn into gas appliances by natural draft.'

424 Chapter 17: .

464 CHAPTER 20 1953 Guide- `Table 2.