Ml: .1. \iriu ON THE RECOVERY OF IK"N | I;M\I <>Yl.l;sTi;.\IN. 



15 



( 'in ve No. 2 illustrates the semi-plastic condition of the material immediately after 

 the removal of the overstraining load ; while Curves Nos. 3, 4, and 5 show the pro- 

 gress iniulr towards recovery, '2, 7, and 17 days respectively, after the material had 



TABLE of Readings for Diagram IV. (Slow recovery with time.) 



been overstrained. The manner in which contraction takes place during the removal 

 of the load is shown by dotted lines in Curves Nos. 2, 3, and 4, and it will lx) noticed 

 that comparatively great retraction takes places as the lowest loads are removed. The 

 test illustrated by Curve No. 5 shows that after 17 days' rest recovery was practically 



