848 



Voltaic Electricity. Section 1 : Galvanic Sources of Current. 



No. 60753 



1 fflWa 



3 



60 753. 



60754 60756. 1:51:6. 



60 759 A. 1:4. 



60 758 a. 1:3. 



60 759 B. 1:9. 



60,753. Apparatus as suggested by F. Dolezalek and F. Kriiger, Figure, for demonstrating 

 the current flowing through a circuit consisting of liquids only (M. P. 10 th edn., IV, 

 1, Fig. 495 b) 



The annular vessel is half filled with a 35% solution of sulphuric acid, the surface of this vessel 

 being covered with cork discs. A 30% solution of sodium acetate is introduced above these cork 

 discs, at one side, up to 20 mm, the other side containing a 20% solution of lithiumchloride up to 

 the upper edge of the ring. If the circuit so prepared is placed above the small system of magnets 

 suspended from the stand (the deflections being observed by means of luminous pointer and scale), a 

 deflection of the luminous index is obtained. If the ring is rotated the pointer moves to the other 

 side. If the solution is mixed by shaking no deflection is obtained. 



Galvanic Cells for Ordinary Use. 



The prices of all cells, with the exception of Nos. 60,78560,788 are exclusive of electrolyte. 



Bunsen Cell, Figure, with heavily amalgamated zinc cylinder, porous pot and natural 

 carbon plate, with zinc and carbon pole terminals (Gan.-Man. Fig. 723; Gan.-Kcin. 

 Fig. 813). 



List No. 60,754 60,755 60,756 



Length of Carbon Plato 160 210 260 mm 



0. 7. 0. 8. 0. 10. 



Electrolyte: /inr Cylinder in dilute sulphuric arid. l.Oli sp. gr. (about .~>u rrm II,S0 4 to 1 liter 

 water), carbon plate in concentrated nitric acid. 



- idem, with tall and wide glass vessel and ebonite cross on bottom, for continuous 

 working, charging of accumulators, etc. 



List No. 60,757 60,758 



Length of Carbon Plate 210 2<>U mm 



0. 10. 0. 12. 



60,758 a. Celluloid Top for Bunsen Cells Nos. iio,7:>7 ami ti(i.7.")S (M. T. Fig. 172), Figure 



0. 



Cl. 5679, 5781'-, 2^26, 

 2227, 4517. 



