388 



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



9900. 



9904. 



9922. 



9924. 



NO, 9900. 



No. 9922. 



No. 9924. 



OVEN, Drying, Single Wall, Asbestos, of the type used in the United States Bureau of Soils. 

 Substantially made of heavy asbestos board, 13 inches deep, 18 inches wide, and 48 inches 

 high. Openings are provided at the top for thermometer and gas regulator and near the bot- 

 tom for gas inlet tube. Very satisfactory for drying largo quantities of soil samples. Com- 

 plete with 5 removable shelves of woven wire $65.00 



OVENS, Drying, for Asphalt Testing, see Nos. 360 and 361. 



OVEN, Drying, Double Wall, Dr. Blair's, as used in iron ore analysis. Of heavy sheet cop- 

 per, double walled, with tabulations and constant water level. Provided with four compart- 

 ments, 4%x6x2% inches, and with 4 numbered copper boxes, 4x4%xl 1 / inches, to fit in same. 

 Dimensions over all: length, 24 inches; height without support, 7 inches; total height, 19 

 inches; depth, 7 inches. Mounted on sheet iron base with legs 44.00 



OVEN, Alsop's Steam Drying, see Nos. 14290-1. 



OVEN, Vacuum Drying, Double Wall, for steam or gas heating. Used extensively by the United 

 States Department of Agriculture, sugar laboratories, etc. Made of heavy drawn brass tub- 

 ing tinned inside, with outer jacket separated by 1 inch of steam space. The heavy hinged 

 door is ground to fit the flange of the oven and provided with six thumb screws. Diameter 

 inside, 8 inches; depth, 16 inches. Complete with soft rubber gasket for door, two perfor- 

 ated shelves, two %-inch perforated pipes for introducing moisture, two perforated pipe 

 burners for gas, a constant level arrangement for water with shut-off cock, a nipple con- 

 nection for steam, a draw-off cock for condensed steam, openings for thermometer and for 

 withdrawing air, and with vacuum gage, mounted on angle iron frame incased in sheet 

 iron 250.00 



OVEN, Vacuum Drying, Double Wall, used also for drying in a current of hydrogen, etc. Made 

 of heavy copper, with flanged door held by six thumb screws and sealed with rubber gaskets. 

 Can be used with glycerine, toluol, or water in the jacket and for vacuum up to 20 inches. Out- 

 side dimensions, 18x10 inches. Diameter -inside, 6% inches; depth, 17 inches. With one shelf 

 and with openings for vacuum connections, gage and thermometer, but without gage or 

 thermometer 66.00 



Note: We shall be pleased to co-operate with our customers in the design and manufacture of 

 constant temperature ovens for special purposes as we maintain a department which is de- 

 voted entirely to the development of constant temperature appliances. 



