1918] 



on Studies on Liquid Films 



Table V. 



405 



Thus it may be said that the longevity is increased in the propor- 

 tion of the numbers given in the last two columns, in this case, 

 approximately as the square roots of the relative pressures under 

 which the bubbles were blown. 



For experimental assistance I have to thank ^Y. J. Gi'een, B.Sc, 

 and for reading the proofs and checking the calculations, I am 

 indebted to J. D. H. Dickson, M.A., Senior Fellow of Peterhouse 



College, Cambridge. 



[J. D.] 



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