No. K0851. 



Primary Cells, Polarising Cells. 



853 



60 846. 1 : 5. 



60 848. 1 : 5. 



60 850. 



60851. 



60.832. Battery of 30 small Grove Cells (platinum-zinc cells), for working a projection lantern, 

 in carrying case 



60.833. - - idem, with 50 cells 



For Multiple Commutators (Pachy tropes), see Section: Current Conduction and 

 Distribution. 



Electrolytes for Cells. 



60.835. Copper Sulphate, crystallised per kg 



60.836. Potassium Bichromate per kg 



60.837. Sodium Bichromate per kg 



60.838. Sal-Ammoniac, technically pure per kg 



60.839. Magnesium Sulphate per kg 



Polarising Cells and Batteries. 



60.840. Polarising Cell with platinum electrodes, Figure 



s. d. 

 22. 10. 



37.10.0 



60.841. Polarising Battery (Weinhold's), Figure (W. D., Fig. 527 [500]), for decomposing 

 water by means of a single Bunsen or Grove Cell, with four small platinum cells . . 



60.842. Polarising Battery (Poggendorff's) (M. P., 9 lh edn., Ill, Figs. 418420), with 4 cells 

 and with mercury switch 



60.843. Poggendorff's Switch, for 4 cells. Price without cells 



60.844. Plante Cell (Secondary Cell), Figure (Gan.-Eein., Figs. 958 and 959), 26 cm high 



60.845. --idem, 20 cm high 



60.846. - - idem, with commutator for putting in circuit an incandescent wire while dis- 

 charging, Figure (Gan.-Man., Fig. 830, without the cells illustrated in the book) 



60.848. Grove's Gas Cell, Figure (M. P., 10 th edn., IV, 1, Fig. 502; 9 th edn., Ill, Fig. 422; 

 Gan.-Eein., Fig. 957) 



60.849. Gas Cell (W. D., Fig. 526 [499]) 



60.850. v. Babo's Apparatus, Figure, for showing the elongation of paladium on absorbing 

 hydrogen (Fr. phys. Techn. H, 1, Fig. 284) 



60.851. Landolt's Apparatus for the same purpose, Figure, suitable for projection (Fr. 

 phys. Techn. II, 1, Fig. 285) 



0. 1.6 



0. 1.9 



0. 1.6 



0. 1.6 



0. 0. !) 



1. 0.0 

 3. 0.0 



3. 6.0 

 1. 4.0 

 1. 4.0 

 0.18.0 



1.16.0 



1. 1.0 

 0.15.0 



1. 4.0 

 1. 4.0 



Cl. 4950, 2265, 5016, 5023. 



