116 



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



No. 2068. No. 2082. 



2066. BURNERS, Bunsen (Simple Combustion Furnace). Consists of four adjustable burners having 



regulators for both gas and air and burning cither coal, natural or gasoline gas, mounted on a 



gas supply tube with forks 9}4 inches apart, adjustable through a 3-inch range, for holding 



combustion tubes $13.00 



Burners, Fletcher's 



2068. BURNERS, Fletcher's Argand. A simple, indestructible burner 'for general work. The flame 

 * is shorter, more compact and higher in temperature than the ordinary Bunsen flame. Com- 

 plete with tripod for supporting dishes, etc. 



No A B C 



Bore of horizontal tube, inches % % % 



Gas consumption per hour, feet 2 3% 7 



Each 90 1.30 1.70 



2070. BURNERS, Fletcher's Evaporating, made of solid copper with lap joints. An excellent burner 

 for heating flasks or beakers, as it is free from cold spots or cold air currents, nor does the 

 direct flame come in contact with the glass. Height, about 1% inches in all sizes. 



No A B C 



Diameter, inches 4 5 6% 



Each 2.10 2.80 3.50 



207?. BURNERS, Fletcher's Evaporating, same construction as No. 2070, but of east iron. 



No A B C 



Diameter, inches 4 5 6% 



Each 1.40 1.70 2.80 



2074. BURNER, Fletcher's Low Temperature, giving a complete range of temperature from a gentle 



current of warm air to a clear reft heat, under perfect control. For very low temperatures 

 the ring must be lighted through the opening B. For boiling, the light is applied to the sur- 

 face of the gauze, providing a large body of blue flame, the temperature of which is controlled 

 by forcing air through blast pipe C. Total height, 6% inches; diameter, 5 inches; gas con- 

 sumption per hour, 25 feet 2.80 



2075. BURNER, Fletcher's Low Temperature, same as No. 2074 without blast pipe C 2.40 



2078. BURNERS, Fletcher's Radial, of cast iron, easily cleaned. 



No A B 



Diameter of ring, inches 3% 5 



Diameter of stand, inches 6*4 8 



Gas consumption per hour, cu. ft 12 18 



Each 2.10 2.80 



2080. BURNERS, Fletcher's Radial, for gasoline gas, same as No. 2078, but with capnut regulator. 



No A B 



Each '. ' 3.20 3.80 



2082. BURNER, Fletcher's Solid Flame, for quick heating of large surfaces. Diameter of flame sur- 

 face, 4% inches; gas consumption per hour, 35 feet 2.20 



2084. BURNER, Fletcher's Solid Flame, same as No. 2082, but for gasoline gas, with cap-nut regulator. 



4.00 



2085. PERFORATED CAPS, Copper, for Nos. 2082 and 2084 each .75 



