Electrolytic Apparatus. 



945 



62 231. 1 : 4. 



62 229. 1 : 10. 



62235. 1: 3. 



62 232. 



62.227. Electrolytic Demonstration Apparatus, after Hillig, for demonstrating the main pro- * (1 

 cesses in the electrolysis in the coloured solution of sodium chloride (Ztschr. f. d. phys. 



u. chem. U. 16, 1903, p. 222) 0. IS. (I 



62.228. Electrolytic Demonstration Apparatus after Grimsehl, for explaining the mechanism 



of the transportation of electricity, after Hittorf (Grimsehl, Fig. 862) 0. 12. 



' 



62.229. Apparatus after Hofmann, Figure, for proving that hydrogen and oxygen combine 



only in the proportion in which they are developed from water j 2. 16. 



The apparatus consists of 2 U- tubes with 2 stopcocks, 1 similar tube with 1 stopcock and 3 brass 

 stands on iron tripod with carriers and holders. 



62.230. Apparatus for Electric Endosmose, U-shaped bent glass tube with porous partition 



wall (M. P., 9"' Edn., Ill, Fig. 464) 0. 3. 



62.231. -- idem, for projection, Figure ; 0. 10. 



Electrodes of sheet copper are inserted on both sides by means of rubber bungs, in a glass tube 

 fixed horizontally on a board. A porous partition is fixed in the centre of the glass tube. A glass 

 tube is filled on both sides and the narrow perpendicular glass tube inserted; the liquid then ascends 

 to an equal height in both tubes. If now the current is introduced the liquid falls in one tube and 

 ascends in the other. 



62.232. Apparatus for Electric Endosmose, Figure, for connecting up to 110 220 volts 



I). 0. (M. P., 10 th Edn., IV, 1, Fig. 527) ' 1. 4. 



62.233. Apparatus after Wiedemann, for accurately measuring the liquid carried over to the ! 

 negative pole (M. P., 9" 1 Edn., Ill, Fig. 465), with copper cylinder 1. 10. 



62.234. -- idem, with platinum cylinder 3. 0. 



62.235. Mechanical Model for demonstrating Electrolysis, after Egyed, Figure . . . . i 0. 16. 



A mechanical model for separating and displacing the electrolyte molecules by the electric current. < 

 The atoms of the elements of which the electrolyte is comprised are each demonstrated as a 

 quarter-circle. Each two of these combine to a semi-circle, which demonstrates a molecule of the elec- 

 trolyte. The decomposition of the molecules is shown by the mutual displacement of the quarter- 

 cire.les, so that on the left and right sides one atom each of the elements comprising the electrolyte 

 are freed. 



Cl. 2546, 5808, 

 4254, 5680. 



