266 



CENTEAL SCIENTIFIC CO., CHICAGO, IT. 8. A. 



No. 6342. 



No. 6350. 



6342. 

 6343. 

 6344. 

 6345. 



6346. 



6350. 

 6351. 

 6352. 

 6353. 

 6354. 



6355. 



FURNACES, MUFFLE, ELECTRICALLY HEATED 



FURNACES, Muffle, Hoskins Electric, Type FD, with heating element of Chromel wire wound in 

 spiral grooves on a special refractory muffle, surrounded by packing material with high heating 

 insulating qualities. Heating elements can be easily rewound by user in case of burn-out, as 

 the wire is furnished in spiral coils of the proper length ready to wind in the grooves of the 

 muffle. The entire renewal requires but a few minutes. A rheostat should be used to keep the 

 temperature constant at the desired point. This furnace is useful for ash determinations, igni- 

 tion of precipitates, incinerations, fusions, combustions, enameling, hardening and annealing 

 small pieces of steel, melting alloys and metals, etc. With connecting cord and plug, but with- 

 out rheostat. , 



No 



201 



202 

 4^4x3x8 



1300 

 60.00 

 71.00 



9.00 



8.00 



203 



204 



2100 

 80.00 

 95.00 

 12.50 

 13.00 



3400 



110.00 



135.00 



18.50 



19.00 



Inside dimensions of muffle space, inches. 



Maximum consumption, watts 850 



Furnace only $45.00 



Furnace and rheostat 53.00 



Muffle only without wire 6.00 



Chromel wire for rewinding 5.00 



In ordering, kindly specify voltage. 



RHEOSTATS for No. 6342, for controlling temperature. 



For furnace, No 201 202 203 



Each 10.00 13.00 17.00 



In ordering, kindly specify voltage. 



FURNACES, Muffle, Hoskins Electric, Type FB, for temperatures up to 1100C. These furnaces 

 are designed for heavy continuous duty, and arc intended to operate on low voltages. They are 

 therefore best adapted to operate on alternating current in connection with a transformer. 

 Temperature control is secured by means of a rheostat in the case of No. 202 Furnace and by 

 means of a regulating transformer in the case of No. 204. These furnaces are made for 110, 220 

 and 440 volts on either 60 or 25 cycles. Prices will be quoted upon request in the case of other 

 voltages or frequencies. 



204 

 27.00 



No 202 



Inside dimensions of muffle space, inches 4%x3x9 



2750 



90 



90.00 



167.50 



. . 187.50 



142.50 



162.50 



Maximum power consumed, watts. 



Time required to raise temperature to 1100C., minutes. 



Furnace only 



Furnace with rheostat and transformer, 60 cycles 



Furnace with rheostat and transformer, 25 cycles 



Furnace with regulating transformer, 60 cycles 



Furnace with regulating transformer, 25 cycles 



EXTRA HEATING ELEMENTS, Hair Pin Type. 



For furnace, No 



Number of elements required 



Each .. 



202 



10 



1.25 



204 



7%x5xl2V 2 

 6000 



90 



125.00 

 282.50 

 322.50 

 282.50 

 322.50 



204 



10 



3.00 



In ordering, kindly specify voltage. 



Note: Furnaces of type FB with larger muffle space than those listed can be furnished on short 

 notice, but are not carried regularly in stock. Prices quoted upon application. 



