516 Proceedings of the Royal Society of Edinburgh. [Sess. 
7 . The susceptibility -temperature curve of a specimen of soft iron 
containing 0’06 per cent, of carbon exhibits no turning points in the 
neighbourhood of 200° C. for fields lying between 2 and 15 c.g.s. units. 
The work described in the present paper was carried out in the 
Natural Philosophy Institute of the University of Glasgow. The author 
desires to express her thanks to Professor Gray and to Dr J. G. Gray 
for the interest they have taken in the progress of the experiments. 
(Issued separately July 7 , 1911 .) 
