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V.^RIATIONS OF «, Ó AND /()(/ Q FOR THE ALTERED TIME OF PA3S.\GP. 



THROUCH THE PERIHELION. 



Leyden, January 1906. 



Physics. — '■'On the motion of a im'tal wire througlt n lump of ice". 

 By L. S. Ornstein. (Communicated by Prof. H. A. Lorentz). 



In a well known experiment on the regelation of ice a metal 

 wire cliarged with weights is placed on a Inmp of ice. It moves 

 slowly through the ice, while on the upper side new ice is formed ; 

 after a short time the motion takes place with uniform velocity. This 

 phenomenon is explained by the fact, that if we increase the pressure 

 the meltingpoint is lowered. 



In order to calculate the velocity of the wire I shall consider an 

 infinite circular cylinder which is moved through an infinite lump 



