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



267 



No. 6362. 



No. 6372. 



FURNACES, Muffle, Multiple Unit Electric, for temperatures up to 955C., for ignition of pre- 

 cipitates, ash determinations, fusions, heat treatment of steel, melting of alloys and metals, en- 

 ameling, etc. These furnaces are of the multiple unit type, the heating element being made in 

 four sections forming the sides of the muffle chamber. Either of these sections may be replaced 

 independently of the others in case of a burn-out, and all may be reversed, if desired to change 

 from open groove to closed face, the change increasing the time of heating only 3 per cent, on 

 account of the high conductivity of the material. The superior heat insulation of the Multiple 

 Unit Furnaces permits a larger muffle space for the same power consumption. These furnaces 

 can be operated interchangeably on 110 and 220 volts by means of a selective plug furnished 

 with the equipment. The counter-weighted doors are reversible for hinging at either top or 

 bottom of opening, and are provided with % inch air tight mica peephole. A % inch 

 pyrometer opening is provided in rear head. A rear door of the plug type with vent hole and 

 handle can be supplied if desired, at additional charge. Complete with six feet of flexible leads 

 and connector plug, and with metal shelf for holding crucibles, tongs, etc. 



No 50 52 54 



Inside dimensions of muffle space, inches. 3*4x2%x7 4%x3xlO 5%x3%xl2 



Outside dimensions of furnace, inches. .. 12>4xlO4xl4 15x12^4x16 17xl3%xl8 



Shipping weight, furnace only, Ibs 65 100 135 



Shipping weight with rheostat, Ibs 72 107 148 



Eating of current for 110 volts, amperes. 9.1 13.1 18.8 



Bating of current for 220 volts, amperes. 4.55 6.55 9.4 



Maximum power consumption, watts .... 1000 1440 2070 

 Kilo watt hours consumed in reaching 



1400F. (760C.) from 75C .5 .72 1.2 



Kilo watt hours consumed in holding 



1400F. (760C.) .39 .89 1.37 



6362. Furnace only $45.00 60.00 80.00 



6363. Furnace with, rheostat. 55.00 72.00 96.00 



6364. Extra units for top or bottom, each 3.25 5.25 7.50 



6365. Extra units for side, each 2.50 3.50 5.50 



6366. Refractory only for top or bottom, each. . 1.75 2.75 3.50 



6367. Refractory only for side, each 1.25 1.75 2.75 



6368. Coiled wire only for re-winding top or 



bottom, each 1.50 2,50 4.00 



6369. Coiled, wire only for rewinding side, each. 1.25 1.75 2.75 



6370. Rear doors, extra 5.00 5.50 6.00 



Note: Always specify voltage when order includes rheostat 



6372. FURNACES, Muffle, Multiple Unit Electric, same as No. 6363, but with rheostat encased in hous- 

 ing below furnace body, convenient for nse. This position also eliminates unsightly and dan- 

 gerous wiring. Complete with six feet of flexible leads and connecting plug. 



No 60 62 64 



Inside dimensions of muffle space, inches. 3Vix2%x7 4^4x3x10 5*4x3%xl2 



'Outside dimensions of furnace, inches... ISxlO^xlS 14%xl2%xl6% 16M>xl3%xl9 



Shipping weight, Ibs 70 105 135 



Each 63.50 82.00 107.50 



In ordering, kindly state voltage. 



For EXTRA UNITS AND PARTS for No. 6372, see Nos. 6364-6370. 



