No. 63118. 



Puluj Tubes. 



1021 



63 113. 1 : 5. 



63 108. 1 : 5. 63 111. 1:5. 63 112. 1 : 6. 



63 114. 1 : 5. 



63 115. 1 : 5. 



63 116. 1 : 5. 



63 117. 1 : 5. 



63 118. 1 : 5. 



63.109. (44) Electric Radiometer, with fixed vanes and rotating phosphorescent disc . 



63.110. (45) - - with fixed vanes and 2 discs rotating in opposite, directions 



63.111. (46) Phosphorescent Lamp, Figure 



<;:;.lli}. Puluj 's Lamp with 2 phosphorescent colours, Figure 



Under the action of cathode rays the two circular halves light up in the same colour but sub- 

 sequently phosphoresce in different colours. 



63.113. (50) Valve Tube, Figure 



When the vacuum is high the discharge can only pass in one direction through the tube, since 

 this charge is influenced by the static charge of the glass walls. This tube is the original copy of 

 the valve-tubes now used in X-ray practice for suppressing the light occurring on making. 



63.114. (54) Zollner's Double Radiometer, Figure, with normal and abnormal rotation, 



with base 



63,115. Vacuum Tube with phosphorescent mineral, Figure, with base 



63,116. Vacuum Tube with three different phosphorescent minerals, constructed of phos- 

 phorescent glass, Figure 



63.117. Vacuum Bulb with butterfly, Figure, with base 



63.118. Radiometer with bouquet, Figure, with base . . 



s. d. 



0. 15. 



1. 2.0 

 0. 14. 

 0. 18. 



0. 8. 



1. 0. 



0. 13. 



1. 4. 



o.'ie. o 



1. 10. 0- 



Cl. 2939, 2941, 3565, 2941 a, 2942, 

 2!i43, 2944, 2946, 2947. 



