CONTENTS. 
PAGE 
Mestoma antarcticum (sp. nov.) from Bloemfontein. By T. F. 
Deeyee, B.A., Ph.D. . . . . . . " . . 1 
Colour and Oheniical Constitution : A Study of the Phthaleins and 
Related Compounds. By James Moie, M.A., D.Sc, F.I.C. . 5 
Note on an Expansion of the Product of Two Oblong Arrays. By 
Sir Thomas MuiE, LL.D. . .15 
A Summary of the Distribution of the Genera of South African 
Flowering Plants. (With Special Reference to those found in 
the Divisions of Uitenhage and Port EHzabeth.) By S. 
SCHONLAND , . 19 
Notes on (a) Radiation Patterns of the Transformation of Magnesium 
Hydroxide to Magnesium Oxide, [h) Serpentine, Malachite, 
and Pseudomorph Quartz, (c) Bultfontein Apophyllite. (d) 
Diamond Tests by Radiation Patterns, (e) Diffraction from 
the Edges of a Square Plate of Iodine. By J. Steph. v. d. 
LiNGEN. (With Plates I- VI) . . . . . . .59 
Kimberley Diamonds : Especially Cleavage Diamonds. By J. R. 
Sutton, M.A., Sc.D., F.R.S.S.A. . . ... .65 
Note on the Resolvability of the Minors of a Compound Deter- 
minant. By Sir Thomas MuiB, LL.D 97 
A Lunar Period in the Rates of Evaporation and Rainfall ? By 
J. R. Sutton, Sc.D., Hon. Memb. R. Met. S. . . . . 103 
