Mr Aston, Neon Lamps for Stroboscopic Work 



301 



possible consistent with the potential available in the spark, and 

 consists essentially of two relatively large spaces containing the 

 electrodes connected by a very long capillary tube which is the 

 counterpart of the filament in an ordinary glow lamp. In the lamps 



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Neon vacuum lamp for Stroboscopic work. 

 Two-thirds actual size. 



in use the filament is about 60 cm. long by 1 mm. diameter and is 

 coiled up inside the space containing the anode. This was done for 

 convenience and strength, but it has another and important 

 advantage, for this type of construction is strongly unsymmetrical 

 to the discharge, allowing it to pass much more easily in the direc- 



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