442 



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



No. 12140. 



Nos. 12136-7. 



No. 12128. 



No. 7402. 



No. 12148. 



12124. SIEVES, Standard, Brass Frame, seamless, brass gauze, according to the specifications of the 

 American Society for Testing Materials; diameter, 8 inches. 



Mesh 10 20 30 40 50 60 70 80 SO 100 



Each $3.70 3.00 3.00 3.00 3.25 3.25 3.40 3.70 4.00 4.30 



Mesh 110 120 130 140 150 160 170 180 190 200 



Each 4.45 4.60 4.95 5.20 5.50 5.80 6.40 7.00 7.35 7.60 



12125. 

 12128. 



7402. 



COVERS AND BOTTOM PANS for No. 12124 per set 2.00 



SIEVES, Standard, Tin Frame, seamless, brass gauze, similar to No. 12124, but nested in set of 8, 

 from 5 to 8% inches in diameter consisting of one each 10, 20, 30, 40, 50, 80, 100 and 200 mesh 

 24.00 



SIEVES, Wheat Dockage, according to Government specifications, a set of four sieves, 13 inches 

 in diameter, and bottom pan, constructed of aluminum, telescoping. Consists of a buckwheat 

 sieve with 8/64 inch triangular perforations; a fine seed sieve with 1/12 inch round perfora- 

 tions; a scalper sieve with 12/64 inch round perforations; and a chess sieve with perforations 

 4 1 //64 by Vs inch. (See Regulatory Announcement No. 2 of Federal Wheat Grades Effective 

 July 1 and August 1,1917) 8.00 



SIEVES, Wood Frame, brass gau/e. 



Mesh 20 40 60 80 100 200 



12136, 

 12137, 

 12140 



Each, 6 inches in diameter 50 



Each, 8 inches in diameter. 



.60 



.60 

 .65 



.75 

 .80 



.90 

 1.00 



1.10 

 1.25 



3.20 

 3.50 



SIEVES, Wood Frame, consisting of a heavy wooden frame provided with a slot in which may 

 be placed bottoms of perforated steel, and hinged at one end to facilitate removal and replace- 

 ment of these metal bottoms. Inside dimensions of frame, 17% x 14 x 5 inches. Ten bottoms 

 are included with perforations of %, *4, %, %, 1, 1*4, 1%, 2, 2%, and 3 inches 18.00 



12148. SIEVE SHAKER, for Power, for use with No. 12110 Sieves. A motor of 1/20 h. p. is mounted 

 on the same base with an eccentric shaft, to which it is belted. The set of sieves is clamped 

 in a frame at the end of a long lever arm which rests on the eccentric. This lever arm is so at- 

 tached to the eccentric that with each revolution of the cam the sieves are struck sharply, raised 

 and dropped with a motion similar to that used in shaking by hand. Without sieves. (See 

 Bulletin No. 84, United States Department of Agriculture, Bureau of Soils.) 



No A B C D 



A.C. D.C. 



For volts 110 220 110 220 



Each 50.00 51.00 45.00 46.00 



