﻿Form of Liquid Drop suspended in another Liquid. 149 



Now make use of the relation for the slopes of the curves, 

 and we o - et 



But/ n \ is the variation coefficient of ir n with regard 

 to p at constant temperature ; and this is known to be — ; 

 similarly 



\ "dp /t v ' 



so we obtain finally 



dr = <m 



dp dp 12 



that is, the variation of t, the temperature of the triple- 

 point, with hydrostatic presure is equal to the variation of 

 the melting-point with hydrostatic pressure. 



dr 

 It should be observed that -7- is not the slope of the line 



CO' on the 7r, T diagram, but the slope of the corresponding- 

 curve on a p, t diagram. 



This question has been here discussed with special reference 

 to the case of ice-water-steam. But the results obtained are 

 of course general for all triple-points and can be extended 

 to the case of multiple-points. 



Dec. 5th, 1914. 



XV. On the Form of a Liquid Drop suspended in another 

 Liquid, whose density is variable. By James Rice, M.A., 

 Lecturer in Physics, Liverpool University* . 



IN the August number of the Phil. Mag., Lord Rayleigh 

 has considered the Equilibrium of Revolving Liquid 

 under Capillary Force. 



The following paper offers a partial solution to a similar 

 problem, viz., to discover the form assumed by a liquid drop 

 suspended in another liquid, whose density varies with the 

 depth. 



The investigation was suggested by an effect which is 

 observed in carrying out the well-known experiment of 



* Communicated by the Author. 



