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



317 



7845. 

 7848. 



7849. 

 7852. 



7853. 

 7856. 



7857. 



No. 7872. 



No. 784S. 



No. 7880. 



No. 7874. 



No. 7876. 



No. 7878. 



HYGROMETER, Registering (Hygrograph), for furnishing continuous record of humidity over a 



period of 24 hours. Complete with charts for one year ". $60.00 



CHARTS for Xo. 7844 Per box of 55 2.50 



HYGROMETER, Sling Psychrometer, designed for the purpose of obtaining quicker and more 

 accurate results than are possible with the stationary wet and dry bulb instruments. Two 

 special thermometers, carefully selected, are mounted on a nicely finished metal plate provided 

 with a wooden handle and swivel, and a ring for suspending the instrument when not in use. 



Approximate range to 100F. in 1 divisions 6.00 



THERMOMETERS only of No. 7S48 Each 1.60 



HYGROMETER, Sling Psychrometer, Standard Grade. Similar to No. 7848, but with thermom- 

 eters of highest grade, graduated in half degree divisions, and with a copper protecting case 



1'i " 4 iiic-lu-s long , 11.00 



THERMOMETERS only of No. 7852 Each 3.50 



HYGROMETER, Sling Psychrometer, Pocket Type, Standard Grade. Similar to No. 7852, but 

 7 inches long with chain sling and 5-inch thermometer graduated in 1" divisions. Complete 



with leather carrying case - 13.50 



THERMOMETERS only of No. 7856 Each 3.50 



7860. HYGROMETER WICK. Silk, fits any of our hygrometers 15 



7870. ICE BAG. of heavy canvas, 20x38 cm, for breaking ice 25 



7872. ICE CHIPPER for use in quickly chipping ice to small bits of a size convenient for laboratory 



purposes. Tinned iron frame, wood handle ' 75 



7874. ICE CUTTING MACHINE. Height, 15 inches; weight, 14 pounds. Hopper, 4^x6 inches by 

 about 4 inches deep. A compact, simple and strong machine which cuts ice into small diamond 



shaped pieces with ease and rapidity $9.50 



7876. ICE CUTTING MACHINE, with blades which cut the ice into pieces about the size of a pea, 

 Size of opening, 4x6 inches; height, 18 inches; space occupied, 9^x9% inches; weight, 



30 pounds 13.00 



7878. ICE CUTTING MACHINE, similar to No. 7876, but of larger size, for floor use. Size of opening, 

 8Hxl2 inches; height, 43^ inches; floor space occupied, 24x17% inches; capacity, 75 to 125 



pounds of ice per minute ; weight, 280 pounds 49.00 



7880. ICE SHAVER for shaving ice, coarse or fine, as may be desired; of tinned iron with removable 



steel cutter .60 



IGNITION TUBES, see Combustion Tubes; Tubes. 



