210 



Professor Sir James Dewar 



[Jail. 19, 



bubble was 50 per cent, of o-lycerine with 5 per cent, of ammonium 

 oleate. This shows the rapid reduction in the daily rate of con- 



Table 14. 



Period 



1st day 

 2-9 „ 

 10-21 „ 

 22-34 „ 



Eatio of Water-vapour 

 Absorption 



0-452 

 0-073 

 0-014 

 0-003 



densation occurring within a month, — namely, from 0'-152 mgm. 

 .at the beginning down to 0*003 mgm. at the end. 



Altering Compositiox of the Bubble Drainage. 



The variation of the composition of the liquid draining from the 

 l)ubble, during the early portion of these experiments, is shown in the 

 next two diao;rams. 



lO 



15 DAYS 20 



O 5 



Fig. 15.— Altering Composition op Liquid Collected from Bubble 



WHEN Diluted by Condensation of Water. 16 cm. air bubble ; 



55 per cent, soap-glycerine. 



