280 



Mr. C. T. E. Wilson. 

 Sulphur Dioxide. 



Leak/pressure, mean of (3) (8) = '33. 

 Relative leak (air = 1) = 2" G4. 



Chloroform. 



Leak/pressure, mean = 0'59. 

 Relative leak (air = 1) = 4 '7. 



These results are represented graphically below. 



so -<K> so 60 



Pressure cm. of mercury. 



