PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1907-8. 
Part III.] VOL. XXVIII. [Pp. 193-256. 
CONTENTS. 
NO. PAGE 
X. The Theory of Compound Determinants in the Historical 
Order of its Development up to 1860. By Thomas Mum, 
LL.D., 197 
{Issued separately April 8, 1908.) 
XI. The Product of the Primary Minors of an n-~by-{n + l) Array. 
By Thomas Mum, LL.D., . . . . . 210 
{Issued separately April 8, 1908.) 
XII. Seismic Radiations. By Professor C. G. Knott, D.Sc., . 217 
{Issued separately April 9, 1908.) 
XIII. The Systematic Motions of the Stars. By Professor Dyson, . 231 
{Issued separately April 9, 1908.) 
XIY. On a Sensitive State induced in Magnetic Materials by 
Thermal Treatment. By James G. Gray, B.Sc., Lecturer on 
Physics in the University of Glasgow, and Alexander 
D. Ross, M.A., B.Sc., Assistant to the Professor of Natural 
Philosophy in the University of Glasgow. {Communicated 
by Professor A. Gray, F.R.S.), .... 239 
{Issued separately April 10, 1908.) 
XV. On a Test for Continuity. By W. H. Young, Sc.D., F.R.S. 
{Communicated by J. H. Maclagan Wedderburn), . 249 
{Issued separately April 10, 1908.) 
EDINBURGH : 
Published by ROBERT GRANT & SON, 107 Princes Street, and 
WILLIAMS & NORGATE, 14 Henrietta Street, Coyent Garden, London. 
MDCCCCVIII. 
Price Four Shillings. 
