CENTRAL SCIENTIFIC CO., CHICAGO, TT. S. A. 



285 



No. 6795. 



No. 6798. 



No. 6810. 



6795. GAS EJECTOR for raising pressure of gas in suction producer to force it through meter and 

 burner. 



No A B C 



Capacitv, eu. ft. per min 0.1 0.2 0.5 



Each .'. $15.00 18.00 25.00 



6798. DUST. TAR AND MOISTURE DETERMINATOR for illuminating gas, complete with meter, 



two dust filters and calcium chloride flasks 160.00 



6799. DUST FILTER WELL only of No. 6798, without meter 45.00 



6810. CALORIMETER, Junkers, Mann's modification, for determining the approximate heating value 



of gas. Consists of a double walled copper vessel provided with a number of tubes or flues so 

 arranged as to receive the heat from a Buns?n flame. These tubes coming in contact with water 

 which is running continuously through the Calorimeter give up their heat. A thermometer 

 placed in the orifice at the top registers the temperature of water at delivery, a second ther- 

 mometer placed in orifice at the bottom registers the temperature at entrance. Any convenient 

 gas measuring apparatus will give the amount of gas supplied the burner. (See No. 6812 Thorp 

 Gage, or No. 6814 Gas Meter.) A vessel placed to catch water delivered gives amount of water 

 passing through the Calorimeter. Complete with support, but without gas meter or ther- 

 mometers 10.00 



6812. THORP GAGE, a convenient means of measuring approximately both the pressure and the rate of 

 flow of gas. When the gas supply is attached to the inlet and the cap is screwed down over the 

 outlet at top, the index reads on left hand scale the pressure in inches of water. When testing 

 the consumption of a burner, the pressure cap is unscrewed and the burner screwed in its place. 

 The indicator then registers on the right hand scale the number of cubic feet of gas consumed 

 per hour 16.00 



(5S14. GAS METER, Constant Pressure, for use with No. 6810, consisting of a galvanized iron tank 

 in which a gas tank having a capacity of about 2 cubic feet is floated. Only a small amount 

 of oil or water is required. The gas tank is kept in an upright position by two vertical 

 guides, one of which is provided with a scale so graduated that readings of the contents of 

 the tank may be made to within 0.01 cubic foot. The tank is provided with inlet and outlet 

 stop-cocks of brass and with a manometer graduated in millimeters for indicating the gas 

 pressure, which may be varied by means of weights placed on the tank. A counterpoise is 

 provided both for filling the tank and for adjusting the pressure on the gas. Complete as 

 described with weights of 1, 2 and 5 kilos and a weight hanger weighing 1 kilo 50.00 



6816. CONSTANT LEVEL WATER TANK or Weir, for use with No. 6810 Calorimeter or any other 

 device in which the flow of water at a uniform pressure is important. Consists of a metal 

 tank of about 350 cc capacity, provided with inlet and outlet tubes properly arranged, and 

 with a clamp for attaching to an upright support rod of *-inch diameter 4.00 



GAS COCKS, see Stop-Cocks. 



