290 



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



CENTRAL H SCIENTIFIC 

 No. 6970. 



No. F6857. 



No. F6851. 



No. 6962. 



6962. 

 6970. 



GAS PALLADIUM TtTBE, Hempel'S, for hydrogen determinations, containing about 2V 2 grams 

 of palladium sponge $7.50 



GAS PHOTOMETER, simple form, for determining candle power of illuminating gas. Consists 

 of nickeled steel rod, graduated from to 200 cm in 1 mm divisions; end supports for gradu- 

 ated rod; two eye shades or screens with supports; Bunsen-Dibdin photometer box with clamp 

 for supporting same; gas burner mounted on adjustable support with six-foot tip; and stand- 

 ard incandescent lamp, 16 candle power, 110 volts -. 35.00 



Parts and Accessories for No. 6970. 



F6851. PHOTOMETEE BOX, Bunsen, Dibdin's Modification. In the Bunsen box the grease spot and 

 its surrounding media do not transmit light equally, and in consequence the grease spot is 

 never entirely lost, even when equal illumination is on either side. We have therefore modi- 

 fled the Bunsen form, according to Dibdin, and use a star of paper through which light may 



pass. Mounted on rod to fit No. F180 Clamp 3.50 



F6857. PHOTOMETER BOX, Lurnmer-Brodhun, contrast type, with which lights of different color values 

 may be compared more accurately than with the disappearing type. Mounted on rod to fit No. 



F180 Clamp 60.00 



CANDLE HOLDER, for one candle, mounted on rod to fit No. F179A Clamp 55 



CANDLE HOLDER, for four candles, mounted on rod to fit No. F179A Clamp 1.00 



LAMP SOCKET, Edison, for holding incandescent lamps, mounted on rod to fit No. F179A 

 Clamp 1-25 



F6801 

 F6803 

 F6817 



