Temperature Control The Fulton Sylphon Company Manufacturers of Sylphon Automatic Temperature Controlling Instruments and Packless Expansion Joints Knoxville, Tenn.

Temperature Control Minneapolis-Honeywell Regulator Company Automatic Control Systems for Heating, Ventilating, Air Conditioning BROWN INSTRUMENTS for Indicating, Recording, Controlling NATIONAL PNEUMATIC CONTROLS for Heating and Air Conditioning Factories: MINNEAPOLIS, MINN., PHILADELPHIA, PA., WABASH, IND., CHICAGO, ILL.

Insulation Windows Libbey-Owens-Ford Glass Gofnpany Toledo, Ohio THERMOPANE Metal Sealed Insulating Units Double-Glass Insulation in a new.

The Torrington Mfg.

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Healing Systems Hot Water and Industrial Piping GRINNELL COMPANY- Heating, Industrial and Power Plant Piping, Fittings, Hangers, Valves, Pipe Bending, Welding, Piping Supplies, Etc.

Ah Conditioning SSL DRAVO CORPORATION HEATER DEPARTMENT 300 Penn Avenue, PITTSBURGH, PA.

Air Conditioning Unit Heaters and Coolers FEDDERS MANUFACTURING COMPANY, INC. 85 TONAWANDA ST.

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, .Bends, Coils, Fittings Mot Water and Industrial Piping GRINNELL COMPANY- Heating, Industrial and Power Plant Piping, Fittings, Hangers, Valves, Pipe Bending, Welding, Piping Supplies, Etc.

Healing Systems Steam Systems Specialties G.

Heat Tra^fflissin Coefficients of Building Materials 141 r,,MBINED COEFFICIENTS,OF TRANSMISSION (10 OF PITCHED ROOFS" AND Tabus 17.

516 CHAPTER 24, 1049- Guide in the heating system to take place without producing undesirable stresses due to pressure in any part of the system.

Heating Systems Burners, on '#&&&& Burner Co.