No. 52 ,200. 



Auxiliary Apparatus for Whirling Tables. 



287 



.. J 



52056,51949. 1:9. 



52057, 51949. 1 : 10. 



52058. 1 : 10. 



52 059. 1 : 9. 



52 060. 1 : 5. 



52,057. Rotating Device for large Geissler Tubes of 30 50 cm long, Figure, with well 



insulated lead, for induction coils giving a spark of 40 100 mm 



52.058. Disc (Poggendorff's), illuminated by Geissler tube, Figure, for proving that the 

 light emitted by Geissler tubes is only apparently continuous (M. P., 9 th Edn., Ill, 



Fig. 763), with one Geissler tube 0.15.0 



52.059. Apparatus for Arago's Magnetism of rotation, Figure (W. D., Fig. 560 [533]) . 1. 4.0 



An adjustable glass slab with magnetic needle is arranged over a large rotating copper disc 1 . 

 On rotating the disc the needle is deflected in the direction of rotation, being itself finally set in 

 rotation. 



52.060. Rotating Magnet, with rotary copper disc above it, Figure (Fr. phys. Techn. II, 



1, Fig. 1086) 1. 0.0 



Cl. 669. 670, 

 5721, ' 

 5719, 674. 



s. d. 

 1.18.0 



