No. 63 580. 



Vacuum Tubes. 



1017 



63 066. 



63 070. 1 : 6. 



63 075. 1 : 10. 



63071. 1:5. 



63 076. 



63077. 1:6. 



63079. 1:5. 



Stands for clamping Geissler Tubes, F i g u r e, for tubes to 30 cm length; prices without 

 tubes : 



List No. 63,071 63,072 63,073 



For 123 tubes 

 0.10.0 0.12.0 0.15.0 



63.074. - - idem, for a Geissler tube to 60 cm length 



63.075. Ozone Generating Tube after Siemens, Figure 



63.076. -- idem, after G. Miiller, Figure : 



63.077. Angle Mirror for Geissler Tubes, for manifolding the phenomenon, for tubes of 30 cm 

 length, Figure 



62,321. Electromagnetic Motor for rotating Geissler Tubes of length up to 20 cm, Figure 

 on p. 958 



52.057. Rotating Device for Geissler Tubes of 30 50 cm length, for the Whirling Table, 

 Figure on p. 287 



52.058. Poggendorff's Disc, for illuminating by Geissler Tube, Figure on p. 287, for shewing 

 the intermittent course of the luminous flux (M. P. 9 th Edn., Ill, Fig. 763), with a 

 Geissler tube 



63.078. Apparatus after De la Eive, for shewing the rotation of the electric luminous flux 

 about an electromagnet, on stand, without commutator 



63.079. - - i d e m, with commutator, Figure 



63.080. - - idem, arranged so that it can be evacuated, with glass stopcock 



Cl. 6504, 5362, 

 5003, 

 3022, 3859, 



s. d. 



0. 15. 

 0. 15. 



0. 12. 



1. 10.0 

 0. 16. 

 1.18.0 



0. 15. 



1. 2. 

 1. 8. 

 1. 10. 



5538, 

 2916. 



