No. 62469. 



Mutual Induction. 



975 



62 463. 1 : 6. 



62 467. 1 : 3. 



62 466. 1 : 4. 



62 469. 1 : 6. 



<i-.n;4. Magnetic Hammer Break (M. P. 9 lh Edn. Ill, Fig. 735), for automatically interrupting 

 a current 



<>2,4<>5. Circuit-breaking Device after Buff (M. P. 9 th Edn. Ill, Figs. 750752) 



demonstrating; the 



>2.4t>>. Induction Coils with Magnetic Hammer Break, Figure, for 

 fundamental phenomena of induction and of the extra current . 



(ii',407. Slide Induction Apparatus with Magnetic Hammer Break, Figure, for physiological 

 purposes 



t)L'.4(i8. Apparatus, after Branly, for Induction Currents of the higher order 



If the primary current of a spark coil connected with the apparatus is opened, a current is induced 

 in the secondary winding and traverses a spark gap and one of two spirals wound on the same ebonite 

 cylinder. An induced current is consequently produced in the second winding on opening and closing, 

 and ignites a gas jet and flows through a spark gap and a second inductor, as a primary current. Use 

 is made of four spark gaps, five gas burners and three ebonite cylinders having two windings each. 



62,469. Slide Induction Apparatus, after Dubois-Beymond, for all fundamental experiments 

 on induction, Figure, with one iron core, one bar magnet and two handles . . 



Cl. 2808. 2811 

 5128. 



S. d. 



; 0. 16. 



! 2. 0.0 



2. 8.0 



1. 10. 

 17.10.0 



3. 10. 



5740, 



