Physics. — "On Ike shape of large liquid drops and g as- bub bles 

 and the ?ise tnade of them for the measurement of capillary 

 constants." By Prof. J. E. Vkrschaffelt. Supplement N". 43n to 

 the Communications from the Priysical Laboratory at Leiden. 

 (Communicated by H. Kamkrlingh Onnks.) 



(Communicated in the meeting of November 30, 1918). 



§ 1. The meridional section of the capillary surface in the case 

 of a surface of revolution is determined by the well-known equation 

 I d{x8in(p) V / u /i\ 



X dx 



dy dz II- 



which on account of the relation ^(Om/ =i -7- = — can also be written 



dx ax 



in the form 



iin (f 

 kz dz = tin (p dff -\ dz 



(1') 



1) Compare: 'On the shape of small drops and gas-bubbles". Leiden Comm. 

 Suppl. N". 42c (1918): these Proc XXI (1) p. 357. 



Fig. 1 gives a diagrammatic representation of the meridional section of the capil- 

 lary surface for k = ^^'~^^''^^ > Ü and for k<0, in the case that R^ (the radius. 



