National boilers, radiators, and specialties: catalog no26 . ne-day Clock Thermostat (39 and 47) No. 55 Eight-day Clock (Duplex) Thermostat 40 .00 No 60 Eight-day Clock (Square) Thermostat No. 65 Hot Water Tank or Boiler Thermostat List Prices.— Motors Only Description Gravity Motor—Weight Power $ Spring Motor—Spring Power 24 .00 6-Volt Operating on 4 Dry Cells Only 39 .00 110-Volt, 60 Cycle, Alternating Current. 110-Volt, D. C. Motor and 2 Dry Cell Thermostat Circuit 49 .00 Designation Gravity (G)Spring (S)D. C. List Prices Complete Regulators ModelNo.
National boilers, radiators, and specialties: catalog no26 . ne-day Clock Thermostat (39 and 47) No. 55 Eight-day Clock (Duplex) Thermostat 40 .00 No 60 Eight-day Clock (Square) Thermostat No. 65 Hot Water Tank or Boiler Thermostat List Prices.— Motors Only Description Gravity Motor—Weight Power $ Spring Motor—Spring Power 24 .00 6-Volt Operating on 4 Dry Cells Only 39 .00 110-Volt, 60 Cycle, Alternating Current. 110-Volt, D. C. Motor and 2 Dry Cell Thermostat Circuit 49 .00 Designation Gravity (G)Spring (S)D. C. List Prices Complete Regulators ModelNo. No. 40No. 47No. 55No. 60No. 65 Motor Equipmenf (Plain Thermostat, no Clock) (One-day Thermostat) (Eight-day Duplex) (Eight-day Square Clock). .(Hot Water Tank or Boiler Gravity Spring A. C. D. C. $ $ $ $ 110D C. $ 00 In ordering give model number and add motor designation. 83 NATIONAL HEATING SPECIALTIES Novus Sectional Coverings. Wool Felt Covering For Hot Water and Low-Pressure Steam Pipes We furnish this covering in any thick-ness, with body of superior wool felt, whichmost steam fitters agree is the best non-conductor for low-pressure heating is lined inside with asbestos paper andis of the highest standard of quality. Asbestos Air Cell Covering For Hot Water and High and Low-Pressure Steam This covering is made of special corru-gated paper. It is a recognized non-con-ductor, thoroughly fire-proof and almostindestructible. It is full quarter-inch andhas small corrugations, leaving little spacefor confined air. It is light and easilyapplied and will not pinch down inworking. One inch or four-ply is used forhigh:pressure, three-quarter inch or three-ply is used for low-pressure, and one-halfinch or two-ply is used for hot water.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteambo, bookyear1920
