CONTENTS. 
PAGE 
Mestoma Antarcilcum (sp. nov.) prom Bloemfontein. By T. F. 
Dreyer, B.A., Ph.D. (With text-figs. 1,2). . . . 1 
Colour and Chemical Constitution : A Study of the Phthaleins 
AND Eelatbd Compounds. By James Moir, M.A., D.Sc, F.I.C. 5 
Note on an Expansion of the Product of Two Oblong Arrays. 
By Sir Thomas Muir, LL.D .15 
A Summary of the Distribution of the G-enera of South 
African Flowering Plants. (With Special Eeference to 
those found in the divisions of ultenhage and port 
Elizabeth.) By S. Schonland. ...... 19 
Notes on (a) Eadiation Patterns of the Transformation of 
Magnesium Hydroxide TO Magnesium Oxide. (&) Serpentine, 
Malachite, and Pseudo-morph Quartz, (c) Bultfontein 
Apophyllite. (d) Diamond Tests by Eadiation Patterns. 
(e) Diffraction from the Edges of a Square Plate of 
Iodine. By J. Steph. v. d. Lingen. (With Plates I — YI) . 59 
Kimberley Diamonds: Especially Cleavage Diamonds. By J. E. 
Sutton, M.A., Sc.D., F.E.S.S.A \ .65 
Note on the Eesolvability of the Minors of a Compound 
Determinant. By Sir Thomas Muir, LL.D. ... 97 
A Lunar Period in the Eates of Evaporation and Eainfall ? 
By J. E. Sutton, Sc.D., Hon. Memb. E. Met. S. . . . 103 
Colour and Chemical Constitution : Part II, — The Spectra of 
THE Mixed Phthaleins and of the Sulphone- phthaleins. 
By James Moir, M.A., D.Sc, F.I.C Ill 
Note on the Genus Terfezia ; A Truffle from the Kalahari. 
By I. B. Pole Evans, M.A., B.Sc, F.L.S. (With Plate VII) . 117 
