90 
Proceedings of Royal Society of Edinburgh. [sess. 
On the Law of Elastic Fatigue. By Dr W. Peddie. 
(Read February 5, 1900.) 
{Abstract.) 
In this paper a discussion of the mode of description of the linear 
paths in the (log b , n) diagram — described in previous papers — 
was given. It was shown that the assumption that fatigue was 
induced by oscillation of a wire enabled one, in almost all cases, to 
predict accurately the mode of description of these paths. In a 
few cases, however, when the condition of the wire was such that 
the critical angle fell within the range of experimentally observed 
angles of oscillation, the mode of description of the linear paths 
agreed with the supposition that oscillation diminished fatigue. 
The truth of this supposition seemed also to be confirmed by the 
observed rate of decrease of oscillations in these cases; but further 
experimental evidence is required to fully test the point. 
