CONTENTS. 
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The Spectrum of the Euby.— Part III. By James Moir, M.A., 
D.Sc, F.C.S., F.E.S.S.Af 339 
Some Causes and Effects of Variation in the Eange of Temperature. 
By J. E. Sutton, Sc.D., F.E.S.S.Af., Hon. Memb. E. Met, Soc, 
and Elizabeth M. Sutton, E. E. Met. Soc 341 
Action of Eadium Salts on Glass. By W. A. Douglas Eudge, 
M.A., F.E.S.S.Af. (With four text-figures.) .... 357 
Notes on the Genus Ficus (Tourn.), Linn. By Joseph Burtt-Davy, 
F.L.S., F.E.S.S.Af., F.E.G.S. (With Plates XII.. XIII., and 
two text-figures.) 365 
A New Species of Mesembrianthemitm from the Transvaal. By 
Joseph Burtt-Davy, F.L.S., F.E.S.S.Af., F.E.G.S. (With 
two text-figures.) 369 
The Eesultant of a Set of Homogeneous Lineo-linear Equations. 
By Thomas Muir, LL.D., F.E.S., F.E.S.S.Af 373 
