966 



Voltaic Electricity. Section 6: Electro-magnetism and Electro-dynamics. 



62 382. 1 : 8. 



62 383. 1 : 6. 



62 387. 1 : .-,. 



62 386. 1:10. 



;:.'. 3*2. Demonstration Apparatus for the Magnetic Field of a horse-shoe Electromagnet, after *' 



Gotze, Figure l.ln. <> 



112,383. Ampere's Stand, Figure, reliable pattern, with separate stands; main stand on 

 metal tripod with levelling screws, rotary and fixed in position by screw; wire fignrc.-. 

 of aluminium with silver points. The following appertain to above: 1 solenoid (\V. I). 

 Fig. 536 [509]), 1 simple rectangle (\V. 1). Fig. 531' [505]). 1 double (astatic) rectangle 

 (W. 1). Fig. 534 [507]), 1 wire stirrup with wire coil (W. D. Fig. 535 |508|), 1 boxwood 

 bowl with - concentric rings, I boxwood bowl with partition wall. Also adapted for 

 experiments as suggested in (Ian. -.Man. Figs. 739, 740, 746, 751; Gan.-Rein. Fiirs. S'.tl. 

 893, 877 4. 4. 



This pattern enables the experiments lo succeed with ease. Tne primary condition is that absolutely 

 pure and dry mercury should be employed. This we supply if desired at a charge of 0. 8. per kilo. 

 A current density of 1.5 'Jo amps, is necessary. Precise instructions for use arc jjiven in. 



;2,3t!7. Wire Coil for Ampere's Stand (W. D. Fig. 537 [510]), Figure on p. 962 



I). S. It 



(I. .'(,73,3878, 

 2675, 267. 



