Heating Ventilating Air Conditioning Guide 1938 sectionalizing is for the purpose of avoiding excessive pressure on the fixtures in the lower stories of each system.

Air Conditioning (Accessory Units) Air Controls, Inc.

Heating Ventilating Air Conditioning Guide 1938 BUR, Jullen R.

Heating Ventilating Air Conditioning Guide 1938 WEBSTER, E.

Heating Ventilating Air Conditioning Guide 1939 Since the enthalpy is nearly constant along a wet-bulb temperature line in any air-water vapor mixture, it may be found, approximately, when the wet-bulb temperature is known by using the temperature in Table 6 as wet-bulb temperatures and reading the corresponding enthalpy from the last column, provided the barometric pressure is 29.92 in Hg.

Heating Ventilating Air Conditioning Guide 1939 with water tor a long enough time to permit the wet-bulb temperature f ` the air and the temperature of the water to reach equilibrium, attuo?

Insulation Qmfrnmb S'jndjj&oJmfyxinsL %u&idinjq, Pma&jjm, Alfol Insulation Company Incorporated 155 East 44th St.

jl || If r l ll r Heating Ventilating Air Conditioning Guide 1939 Ilg Electric Ventilating Co., 975 HUMIDITY CONTROL Palmer Co., 1007 Johnson Service Co., 1120-1121 Maid-O-Mist, Inc., 998 McQuay, Incorporated, 876 American Moistening Co., 865 Barber-Colman Co., 1112-1113 Bristol Company, The, 1002 Powers Regulator Co., 1124 119.

Insulation Insul-Wool Insulation Corp.

HWBB-000796> /dr Hygiene Foundation of America, Inc, 4400 Fifth Avenue Pittsburgh, Pa.

GBP LOGICAL WESTERN AUSTRALIA.

CertainTeed Corporation P.0.

-6- "While a few persons may still be of the opinion that such workers" (Workers having silicosis) "are 'through' and doomed to an early death, every study conducted thus far confirms the fact that the great majority of these men will not necessarily progress ft'am bad to worse.

PLAINTIFF'S EXHIBIT LI B E RTY MUTUAL INSURANCE COMPANY HOME OFFICE, BOSTON SUDANI U ' w O BOSTON MASS February 19, 1935.

Reprinted from Tar Avcucak Stmt or Tnocman Vol XXXIX No. 4.