,Boilers Gas The Bryant Heater & Mfg.

Insulation, Building Armstrong Cork & Insulation Company Lancaster, Pa.

Pumps The Trane Company La Crosse* Wis.

Specialties, Heating The Bishop & Babcock Sales Co Cleveland, Ohio 4901-4915 Hamilton Avenue, N.E.

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joint systems and specialty products Why the name Georgia-Pacific makes such a difference.

This instruction booklet is designed for the average homeowner who is involved in a home improvement project and needs simple, easy to follow instructions on how to apply and finish gypsum wallboard.

American Society of Heating and Ventilating Engineers Guide 193 Coefficient of transmission of roof.---------------------.0.485 Conductivity of insulation to be used____________ 0.30 ' T doTttheed slionleu:tion of this problem is indicated on the chart >(Fi[eg-- Dn bty 1.

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Radiation (Concealed Gravity Typ^ Heintz Manufacturing Company i Front Street and Olney Avenue Philadelphia p MANUFACTURERS OF CABINET AND CONCEALED RADIATORS ^ The Heintz Radiator Unit is built of tubing, fins and headers.

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n CODE of ETHICS for ENGINEERS NGINEERING work has become an increasingly important factor E in the progress of civilization and in the welfare of the community.

American Society of Heating and Ventilating Engineers Guide, Chapter 10--Cooling Methods but the resulting loss in efficiency with the higher pressure gases linrits'jE centrifugal compressor to the two refrigerants named.