654 CHAPTER 37 1948 Guide Table 1.

708 i CHAPTER 39 1948 Guide Thermodynamically the effectiveness of a refrigerant-absorbent com bination increases directly with its negative deviation from Raoult's Law.

846 CHAPTER 47 1948 Guide.

870 CHAPTER 50 1948 Guide FRICTION LOSS IN HEAD IN LBS.

42 Heating Ventilating Air Conditioning'- Guide 1948

192 CHAPTER 10 1949 Guifl!

564 CHAPTER 27 1949 Guide; of pipe by welding sometimes warrants using lighter wall thicknesses.

612 CHAPTER 30 1949.

658 CHAPTER 33 1949 Guide and for nuisance abatement.

806 CHAPTER 40 1949 Guide methods for small rooms with exposed wall, such as offices, hotel (guest) rooms, hospital (patients) rooms,'apartments, etc.

812 CHAPTER 41 1949 Guide Table 2.

842 CHAPTER 42 1949 Guide Table 2.

fc. h *'a /t* / 4`M- Note to Members: O',/--/ Here ere the Proceedings for the'fourth fall meeting of Air Hygiene Foundation.

Con fi rjENTi al Mellon Institute of Industrial Research UNIVERSITY OF PITTSBURGH PLAINTIFF'S EXHIBIT tat 4 PROGRESS REPORT for the *eek ended Y.arcr.

% n-.TPP ROBERT i,.