On Impact with a Liquid Surface. 



229 



Series VIII is obtained, in which it will be perceived that the sphere 

 is followed by a cone of apparently adherent air, while the water seems 

 to find great difficulty in wetting the surface completely. 



Sebies VIII. 



Part of this column of air was carried down to a depth of at least 

 40 centims., and then detached only when the sphere struck the bottom 

 of the vessel. 



The last two figures show the side of the crater falling in, but this 

 did not always happen ; the walls often closed over the hollow, exactly 

 as in Series III, figs. 4 and 5. Whether the air column meanwhile 

 splits into bubbles in other places below the surface, I could not 

 observe, but it is very probable that it does so, since its form is too 

 nearly cylindrical for its equilibrium to be stable. "When the fall was 

 increased to 151 centims., the figures of Series IX were obtained. 



The tube of fig. 1 corresponds to the shell of Series III and IV, 

 and is not only elevated to a surprising height but is also in the act 



