No. 624i5. 



Voltaic Electricity. Section 7: Induction Currents. 



971 



62 420. 1 : 9. 



62418. 1:3. 



62 419. 1 : 3. 



62 422. 1 : -2. 



62 423. 1 : 4. 



62 424. 1 : 3. 



62.419. Apparatus after Faraday, simpler, Figure 



A rigid wire, arranged to move in a hook, rotates about the pole of a magnet when traversed by 

 the current, thus describing the outer surface of a cone. The current is conducted (1) by the hook-suspension, 

 (2) by a mercury gutter into which is plunged the free movable end of the wire. 



62.420. Apparatus for the Electromagnetic Action on Flexible Conductors, Figure (M. 



P. 9 th Edn. Ill, Fig. 582) 2. 0. 



A very flexible copper rope, loosely guided upon the elongated conical core of an electromagnet, 

 winds itself spiral-form on the latter when traversed by a powerful current. If the current is reversed by 

 the commutator it unwinds itself and again winds itself up in the reserve direction. 



112,421. -- idem, double preceding size 4. 10.0 



(12,422. Apparatus after Weinhold, Figure (W. D. Fig. 539 [512]), for the rotation of liquid 

 conductors as showing the action of crossed currents; for the Horizontal Projection 

 Apparatus | 0. 12. 



s. d. 

 1. 10. 



Section 7: Induction Currents. 



62.423. Horse-shoe Magnet with Armature and Induction Coil, after Friedr. 0. G. Miillet (M. * d. 

 T. Fig. 217), for proving the laws of induction <>. 12. 



62.424. Model for explaining the Laws of Magnetic Induction for actuated conductors, 

 Figure (W. D. Fig. 556 [529]) 0. 3. 



The apparatus consists of three sheet iron strips soldered together at one end at right angles to 

 each other being tapered at the other end and painted in different colours; they are marked B, E. M 

 (Bewegungsrichtung des Leiters [Direction of Motion of the Conductor], Electromotive Force, Magnetic 

 Field). 



(12.425. Automatic Induction Indicator after Pfaundler (M. P. 9 th Edn. Ill, Fig. 566) ... 0. 5. 



01. 2668, 2669, 2670, 

 4U5, 4679, 2654. 



