110 



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







Nos. 1880-2. Nos. 1884-6. No. 1888. 



No. 1892. No. 1894. 



No. 1896. 



No. 1902. 



No. 1890. 



1880. 



1882. 

 1884. 



1886. 

 1888. 



1890. 



1892. 



1894. 

 1896. 



1902. 



BRUSH, Test Tube, bristle end, brass wire. Length of bristle part over all, 4% inches; diameter, 



1% inches; total length, 10% inches Each $0.09 



Per dozen .85 



BRUSH, Test Tube, same as No. 1880, but with tinned wire Each .05 



Per dozen .45 



BRUSH, Test Tube, sponge end, brass wire, for test tubes % inch or larger in diameter. Length 

 of bristle part including sponge, 3% inches; diameter, 1% inches; total length, 11 inches. 



Each .09 



Per dozen .90 



BRUSH, Test Tube, same as No. 1884, but with tinned wire Each .05 



Per dozen .60 



BRUSH, Test Tube, tufted end, tinned wire. Length of bristle part, 3% inches; diameter, 1 inch; 

 total length, 10 inches. This brush is much superior to the ordinarily so-called tufted end 

 brushes, in which the wire projects at the end making it impossible to clean the bottom of the 

 test tube without breakage. Length of bristle part, 3% inches; diameter, I 1 /! inches; total 



length, 10% inches Each .05 



Per dozen .50 



BRUSHES, Test Tube, Dolbey's (Patented), with tuft of bristles so constructed as to reach all 

 parts of tube, yet affording the most perfect protection to the tube from breakage by the wire 

 end. This is the best test tube brush made and we heartily recommend it to laboratory 

 workers who have been looking for something better than the old style brush with the con- 

 stant annoyance from breakage or imperfect cleansing. 



No A B C 



Total length, inches 9 13% 13% 



Length of bristle part, inches 2% 4 4 



Diameter of bristle part, inches % 1 114 



For test tubes, diameter, inches % to % % to % 1 or larger 



Each .09 .11 .12 



Per dozen .90 1.15 1.20 



BRUSHES, Test Tube, Probangs, with rattan handle and sponge end. Length over all, 9 inches. 



Each .10 



Per dozen 1.00 

 BRUSHES, Tube, for small tubes and funnel stems, of bristle on tinned wire. Length of bristle 



part, 2 inches; diameter, % inch; total length, 12% inches Per dozen .20 



BRUSHES, Volumetric Flask, with flexible steel spring enabling the brush to reach every part of 



flask. No . 



For flasks, capacity, cc , 



Each 



BULBS, Absorption, see Absorption Bulbs; Potash Bulbs. 

 BULBS, Leveling, of glass, for use in gas analysis. 



Capacity, cc > 



Each 



BULBS, Nitrogen or Kjeldahl, see Nitrogen Apparatus. 

 BULBS, Rubber, see Rubber Bulbs. 



A 

 250 

 .25 



B 



500 

 .30 



250 

 .55 



C 



1000 



.35 



500 

 .75 



