No. Ill S'.i.-,. 



Explanation of Ohm's Laws. 



917 



61894. 1:12. 



61895. 1:12. 



61.889. Model for explaining the Galvanic Current and Ohm's Law by comparison with 

 a water lead (Eiidorff-Liipkc, GrundriP der Chorine, 12 th Edn., Fig. 219), Figure 



61.890. Model for explaining the Phenomena in Electric Circuits by liquid currents, after 

 Grim.sehl (Ztschr. f. d. phys. u. chem. U. 8, p. 210), single 



61,891. - - i d e in, double 



61.892. Apparatus after Go'tze, for explaining that three Conductors in parallel act the same 

 as one Conductor of three times the cross section, Figure 



61.893. Apparatus for explaining Ohm's Law, Figure, after Gotze, with precision in- 

 struments - - one ammeter, one voltmeter, one ohmmeter, resistance with contact 

 circuit, and plug arrangement for connecting up the voltmeter to any parts of the 

 resistance ,> 



61.894. - - idem, with Resistances which can be put in parallel or series, Figure, with 

 a precision ammeter for the main circuit, 4 small ammeters, 3 change-over switches, 

 and 1 switches, also a precision voltmeter with plug cords 



61.895. Apparatus for explaining the Wheatstone Bridge hydrodynamically, after Noack, 

 Figure (Ztschr. f. d. phys. u. chem. U. 1, p. 236), with Current Indicator after 

 Szymanski (Ztschr. f. d. phys. u. chem. U. 2, p. 272) 



s. d. 

 1. 15.0 



2. 0.0 

 2. 15. 



7.10.0 



18. 0.0 



24. 0. 



4. 0.0 



Cl. 4124,5881. 



