SOME PHYSICAL PROPERTIES OF ICE 



62: 



The first specimen bent much more easily than the second and 

 broke at the point A in the figure. The same appUes to the third 

 and fourth specimens. 



In another case, three test pieces, each 0.80cm. wide and 

 0.50 cm. thick, were supported with an 8.0 cm. span between the 

 supports. The lowering of the central part by 100 gm. in the 

 first eight hours was 2 .68 cm., 0.2 cm., and i .22 cm. respectively 

 for the dift'erent orientations a, b, and c. A part of the weight 



6 8 10 12 



Time in hours 



14 



16 



Fig. II. — Relative ease of bending of ice bars with different orientations of 

 crystals. 



hanging from the second bar was found supported from beneath 

 by accident so that its bending is not comparable with others. 

 The temperature during this observation ranged from — 5?o 

 to -2?7 C. 



It is clear from these observations that ice bars with their 

 constituent crystals perpendicular to the length, bend and break 

 more easily than the bar with crystals parallel to the length. In 

 the case of observation for the bars b and c, the temperature 

 became so high that the bar suffered from pressure melting at the 



