1890.] 



Observations on Pure Ice. 



113 



Table IV. 



The above observations were made on a cylinder of pure ice 2 feet 

 1^ inches long, 2 feet 1^ inches diameter, and weighing 470 Ibs. 



In experiment No. 2, the ice cylinder had remained at a tempera- 

 ture of from 26 to 28 F. for 46 hours 20 minutes previous to com- 

 mencing the experiment with steel rod No. 2. 



In experiment No. 3, the ice cylinder had remained at a tempera- 

 tuure of 32 F. for 2 hours previous to commencing the experiment 

 with steel rod No. 3. 



These experiments show that the plasticity of the ice was very 



