260 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. 8. A. 



No. 6210. No. 6218. 



FURNACES, ALL KINDS 



FURNACES, COMBUSTION, ELECTRICALLY HEATED 



FURNACES, Combustion, Hoskins Electric, Type FD, for temperatures up to 1000 C. The heat- 

 ing element is of Chromel wire, wound in spiral grooves upon a special refractory tube I%xl2 

 inches inside, and is surrounded by special packing material of high heat-insulating qualities. 

 The element can be easily renewed by the user when burned out. Resistance wire is furnished 

 in the proper length in spiral coils ready to be wound in the grooves upon the refractory tube. 

 The entire renewal requires but a few minutes time and can be made if necessary while the 

 tube is hot. A rheostat should be used to control the temperature. The furnace operates on 

 either A. C. or D. C. with a maximum consumption of 550 watts. Widely used for determining 

 carbon in iron and steel by tin combustion method of Vanier, Johnson and others. With con- 

 necting cord and plug. 



No A B 



For volts HO 220 



6210. Furnace only $25.00 25.00 



6211. Furnace with rheostat 33.50 33.50 



6212. RHEOSTATS for use with No. 6210 to control temperatures within safe working limits. 



No. . A B 



For volts 110 220 



Total resistance, ohms 10 40 



Each 8.50 8.50 



Repair Parts for Furnace No. 6210. 



6213. REFRACTORY TUBE only, without wire 3.00 



6214. CHROMEL WIRE for rewinding. 



No A B 



For volts 110 220 



Each 3.50 3.50 



FURNACES, Combustion, Hoskins Electric, Type FB, for temperatures up to 1100C., for con- 

 tinuous operation. The heating element is a spiral of heavy Chromel wire, which radiates heat 

 directly upon the combustion tube, enabling the furnace to be brought from cold to 1100C. in 

 only 30 minutes. As these furnaces operate on low voltages, they are best adapted for use on 

 alternating currents in connection with a transformer. The temperature should be controlled by 

 means of a rheostat. The element can be readily removed and replaced by the user in a few 

 minutes in case of a burn out. Maximum power consumption, 1000 watts. Length of furnace, 

 12 inches; inside diameter of tube, 1% inches. Complete with connecting cord. 



No A B 



For volts 110 220 



6218. Furnace only 25.00 25.00 



6219. Furnace with rheostat and transformer for 60 cycles 62.00 62.00 



6220. RHEOSTATS for use with No. 6218. 



No A B 



For volts 110 220 



Each 11.00 11.00 



6221. HEATING ELEMENTS for No. 6218. 



No A B 



For volts 110 220 



Each i 5.00 5.00 



