﻿4 MORRIS- AlREY, On the Rigidity of Gelatine. 



stout indiarubber stoppers. Through one, a capillary tube 

 JK is fixed whilst through the other passes a tube whose 

 extremity is attached by flexible tubing to a glass cylinder 

 LM containing some liquid. By varying the height of 

 LM the pressure acting on the right hand side of the jelly 

 may be varied. The distortion of the jelly is measured 

 by the motion of the capillary column in JK.* In filling 

 the apparatus, the tube EF is placed in a vertical position 

 partially immersed in mercury and the solution of gelatine 

 is poured on to the surface of the mercury up to the 

 required level. Fig. 3. 



GELATINE SOLUTION. 



MERCURY. 



Fig- 3- 

 After the jelly has set the lower end of the tube is 

 closed and the tube lifted out cautiously. Pressing the 

 stopper containing the capillary tube into the lower end of 



* Experiments were also made in which the pressure was communicated 

 through the capillary tube, the amount by which the mercury column was 

 forced back being measured. This was not found so convenient as the 

 method described above. 



