Plnl Mag S 5 Vol 10 PI XI 





















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LENGTH OF SPARK IN CENTIMETRES. 



Dielectric. Air Electrodes, Discs. Pressure of Atmosphere 



LENGTH OF SPARK IN CENTIMETRES 

 1 from Oie Upper Curve of Tig \ Cresses merit values given by Sir "VSlKam Thomsc 

 DIAGRAM 2. 















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PRESSURE OF OIELECTIC IN MILLIMETRES OF MERCURY 



; .':-.i.;.:,Disc< Ln.p.t], of Spark, S centimetres 

















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TEMPERATURE IN DEGREES CENTIGRADE 

 rio, Air. Electrodes ,D..c. Length of Spirit « Ceriiimeu-.s. Press 

 DIAGRAM 4. 















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LENGTH OF SPARK IN CEN 

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LENGTH OF SPARK 

 ''■-!■.'■.■, Mr Press 



DIAGRAM 6 



