896 



Professor Sir James Dewar [Jan. 18, 



verv well with the dimensions 



These relations were found to agree 

 of seojments of known volume. , , . , .1 . r 



The area of the curved surface through which the gas transfer- 

 ence takes place (there being practically no loss through the plane 



(1) 



(2) 



(3) 



(4) 



(5) 



(6) 



(1) 

 (2) 

 (3) 



(5) 

 (6) 



Fig. 32. 



Fig. 33. 



Fig. 34. 



ends) is given for a buhl)le whose centre of curvature is not in the 

 axis of revolution by 



S = "' \)h -('l''' - 27rU^= 8-289 1)/ 

 8 V 8 / 



V - ()-29.")//" 



It must be noted that an'uncontracted bubble segment has been 

 assumed. Tliis, however, was no longer the case when it became 

 necessarv to fix the column at both ends (to a nozzle above and a 

 glass ring ])elow). As the contraction proceeded therefore the total 

 leno-th did not alter, so that h remained practically the same 



