No. 60 752. 



Demonstration Cells. 



847 



60745. 1 : 4.j 



60748. 1 : 5. 



60747 and 60748. 1 : 8. 



60750. 1 : 5. 



60751. 



60752. 1 : 4. 



60.744. Zinc-Copper Cell, with gas generating tube, Figure, including stand and seat 

 (M. P. 10 th edn., IV, 1, Fig. 299) 



60.745. Connecting Piece with platinum foil, for proving the heating of the external circuit, 

 Figure; price does not include the Holtz Clamps illustrated, No. 60,172 (M. P. 10 th edn., 

 IV, "1, Fig. 301). The cell most suitable for this is No. 60,746 



60.746. Wollaston Cell, Figure, with simple carbon plate and U-shaped zinc plate . . 



60.747. Trough Cell (Kolbe's), Figure, with, however, only 1 each zinc and carbon plate, 

 for demonstrating the influence of internal resistance (Kolbe-Skellon, Introduction to 

 Electricity, Part II, Figs. 120 and 121) 



60.748. -- idem, with separating wall and a pair of extra plates, F i g .u r e 



60.749. Folding Cell (Grimsehl's) (Ztschr. f. d. phys. u. chem. U. 8, 1894, p. 209, Fig. 1). 



60.750. Zinc-Copper Cell, as suggested by Friedr. C. G. Miiller, F i g u r e, for demonstrating 

 the action of the polarisers (M. T. Fig. 206) 



60.751. Apparatus for demonstrating the E. M. F. at the limits of 2 electrolytes, Figure 

 (Fr. phys. Techn. II, 1, Fig. 503) 



60.752. Reduction-Oxidation Cells, Figure (Liipke, Eiidorffs Grundrifi der Chemie, 12 th edn., 

 1902, p. 286) 



The two cells of the series contain each 1 platinum electrode connected by wire leads to a galvano- 

 meter. 1 cell is charged with a solution of stannic chloride, the other one as well as the syphon 

 connecting the cells containing an acidulated solution of common salt. If a crystal of mercuric chloride 

 is placed on the electrode of the last-named cell, the galvanoscope needle deflects in such manner 

 that this electrode appears as a positive pole. 



s. d. 

 0.12.0 



0. 3.0 

 0. 6.0 



1.10.0 

 2. 0.0 

 0.15.0 



0. 8.0 



0. 4.0 



1. 5.0 





Cl. 5682, 3504, 

 3S74, 5010, 



2480, 

 3704. 



