No. 63211. 



Tesla Experiments. 



1031 



63 207. 1 : 6. 



63 208. 1 : 5. 



63 210. 1 : 6. 



63 211. 1 : 9. 



t 63,208. Spark Micrometer, Figure, in black glass box, on serpentine stone base 

 63,209. - - idem, with silencing box of wood 



t 63,210. High Tension Transformer, Figure, without oil insulation, after Elster & Geitel, 

 with two differently wound secondary coils, 425 mm high, for induction coils to 

 250 mm spark-length 



t 63,211. -- idem, considerably larger, Figure, 640 mm high, for induction coils of 



250 600 mm spark-length 



s. d. 

 1. 6.0 



1.16.0 



3.10.0 



5. 0.0 



Cl. 3039, 2981, 

 2970, 2984. 



