CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



399 



No. 10296. No. 10298. No. 10304. 



C D 



No. 10305. 



No. 10318. 



No. 10324. 



No. 10326. 



No. 10328. 



10296. ELECTRODE TUBE, Capillary, Ostwald, without electrodes $1.25 



1029S. EIiECTBODE TUBE, Capillary, Ostwald, with platinum wire sealed in 1.50 



10304. HALF ELEMENTS, consisting of two glass vessels on supports with heavy non-corrosive bases, 



with adjustable clamps and hard rubber terminals with binding posts. Complete with rubber 

 tubing, glass cylinder, pinch clamps and five different styles of electrodes as illustrated 18.00 



10305. ELECTBODES only of No. 10304, mounted in glass tubes, inserted in robber stoppers. 



No A B C D E 



Style platinum foil platinum ring silver spiral zinc rod copper rod 



Each 2.00 1.00 1.50 .80 .80 



10306. GLASS CELL only of No. 10304 1.25 



10307. GLASS CYLINDER only of No. 10304, for connecting the two elements 60 



F4404. INDUCTION COIL, simple form, after Walker, in sound-proof box 8.00 



10318. IONIZATION CELL, Smith and Hale, with electrodes consisting of glass tubes with fused-in 



platinum wire, welded to copper wire for connection. Complete as illustrated with two cells 

 with rubber stoppers, mounted in paraffined hardwood block 4.50 



10324. MIGRATION TUBE, with silver and copper electrodes sealed in glass tubes, inserted in rubber 

 stoppers. With glass stop-cock 6.00 



10326. MIGRATION TUBE, Findlay, with silver electrodes cemented in glass tubes inserted in rubber 

 stoppers, with detachable TJ tube and three glass stop-cocks for withdrawing liquid for an- 

 alysis. (See Findlay 's Practical Physical Chemistry, page 211) 15.00 



10328. MIGRATION TUBE, Loeb and Nernst, for silver salts, with cathode of silver foil and anode of 

 silver wire in a flat spiral, in glass tubes inserted in rubber stoppers 4.50 



10330. MIGRATION TUBE, Loeb and Nernst, same as No. 10328, but with stop-cock at bottom for 

 withdrawing solution for analysis. (See Findlay 's Practical Physical Chemistry, page 207) 

 6.00 



