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



309 



7578. 



7580. 



7582. 



7589. 



7592. 



No. 7592. 



No. 7582. 



7593. 



HOT PLATE, Electric, Grid Type, three heat, with heating surface 10%xlO% inches; height of 

 plate, 4% inches. A greater amount of heat may be obtained from this plate than from other 

 forms, as the heating unit is in the open and direct radiation is obtained. Provided with switch 

 giving three heats, consuming 220, 440 and 880 watts; finished in nickel-plate. Shipping 

 weight, 17 pounds. Complete with 7 feet of connecting cord and attachment plug. 



No A B 



For volts 110 220 



Each $10.00 10.00 



HOT PLATE, Electric, Grid Type, similar to No. 7578, but with two burners, giving heating 

 surface 10x20 inches; each burner has a separate three heat switch. Current consumption with 

 left hand burner, 220, 440 and 880 watts; with right hand burner, 375, 750 and 1500 watts. 

 Height of plate, 5% inches; shipping weight, 35 pounds. 



No A B 



For volts 110 220 



Each 22.50 22.50 



HOT PLATE, Electric, Grid Type, similar to No. 7578, but with three burners giving a heat- 

 ing surface 14x32% inches. Each burner has a separate three-heat switch. Current eon- 

 sumption with left hand burner, 125, 250 and 500 watts; with center burner, 275, 550 and 

 1100 watts; with right hand burner 375, 750 and 1500 watts. Height of plate, 5% inches; 

 shipping weight, 50 pounds. 



No A B 



For volts 110 220 



Each 32.50 32.5C 



HOT PLATE, Electric, Hoskins Type MA-101, for use on either A.C. or D.C., with heating ele- 

 ments of Chromel wire guaranteed to last one year. With top of pressed steel, heavy bent 

 wire legs, and spiral resistance unit. Heat distribution uniform over top. Very useful for 

 evaporating solutions, drying precipitates, etc. Boils one liter of water from cold in 15 min- 

 utes. Diameter, 6 inches; power consumption, 500 watts; maximum temperature, 483C. or 

 900F. Complete with 6 feet of flexible cord and separable attachment plug. 



No 



For volts 



Each 



EXTRA HEATING UNITS for No. 7578. 



No 



Each 



HOT PLATES, Electric, Hoskins Type MA-111, for use on either A.C. or D.C. 



12x12 inches. Requires only 5 amperes at 110 volts and 2% amperes at 220 volts. Heated 

 at center, covering area 5% inches in diameter. Will boil one liter of water placed in the 

 center from cold in 1 hour and 15 minutes. The cooler section around the center is use- 

 ful for slowly evaporating to dryness contents of beakers, etc. Maximum temperature at 

 center, 260C. (500F.); at edge, 121 9 C. (250F.); power consumption, 500 watts. Complete 

 with 6 feet of twin-conductor flexible cord with separable attachment plug. 



No A B 



For volts 110 220 



Each 12.00 12.00 



EXTRA HEATING UNITS for No. 7592 each 3.00 3.00 



A 

 110 

 8.00 



B 



220 

 8.00 



A B 



3.00 3.00 



Size of plate, 



