MI:, .i Mm; ox THI: m-;o>\ i :I;Y \- n;n\ FI;OM 



tensile overstrain. Tin- curves wliidi have been |>I>tted tV.m these readings are 



slmuii in Diagram XIII. The first series was nhtaim-d trnm ,-i virgin ^] imi-n \' 



1| iiH-li roiiiul steel ml, very similar in quality to the 1-inch r<xls usunllv 



tonafinf 



JO 



I >i;if,'r,-iin NIL XIII. (Compreasion experiments.) 



specimen aimiiar to ff?e, 

 hue After it fad been for 



* A e 



Contractions - diminished by f^5o ^ d/7 inc ^ P* 1 " ton - 

 Scdte - lunit- of An inch. ? - i - 5 



in the tension experiments. The total length of the-specimen was only if diameters, 

 and the ends were carefully faced, so that "buckling" may be said to have been 

 avoided, and the compressional stress applied in as uniformly distributed a manner as 

 was practicable. 



vol.. i \riii. A. 



