176 Proceedings of the Royal Society of Edinburgh. [Sess, 
with the aid of the bolometer in measuring the Thomson effect, to prove 
beyond question the proportionality to the absolute temperature, so that 
no help may be looked for, experimentally, as to the superiority or in- 
feriority of the relation cr A — <tb = A 1 # + B 1 # 2 + C l 0 3 + .... to that of simple 
proportionality. 
I hope, however, in a further paper, to communicate some experimental 
results on the thermo-electrical properties of strained metals, experiments 
on which, with the aid of a grant from the Carnegie Trust, I have presently 
in progress, and to essay a test of the theory from that standpoint. 
Physical Institute of the 
University of Glasgow, 
November 20, 1912. 
(Issued separately April 22, 1913. 
