CO 4s ^ J ! 
PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1906-7. 
No. ii ; VOL. XX VII. [P P . si- 160 . 
CONTENTS. 
PAGE 
XII. Heuslers Magnetic Alloy. By Alexander D. Ross, M.A., 
B.Sc., Houlds worth Research Scholar, University of Glas- 
gow. ( Communicated by Professor A. Gray, F.R.S.), . 88 
{Issued separately May 29, 1907.) 
XIII. The Relation between Normal Take-up or Contraction and 
Yarn Number for the same degree of Twist in Twisted 
Threads. By Thomas Oliver, B.Sc. (London and Edin- 
burgh), Carnegie Research Fellow. ( Communicated by 
Dr C. G. Knott), ..... 93 
{Issued separately May 30, 1907.) 
XIV. The Relation between Normal Take-up or Contraction and 
Degree of Twist in Twisted Threads when the Singles 
are of Unequal Sizes. By Thomas Oliver, B.Sc. 
(London and Edinburgh), Carnegie Research Fellow. 
(' Communicated by Dr C. G. Knott), . . 107 
{Issued separately May 30, 1907.) 
[ Continued on page iv of Cover. 
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