v, 10 
CONTENTS 
PAGE 
The Action of Eucomis undulata, Ait. By J. W. C. Gunn. (With 
three Text-figs.) ......... 1 
The Water Relations of the Pine (Pinus Pinaster) and the 
Silver Tree (Leucadendron argenteum). By R. D. Aitken, 
M.Sc. (With one Text-fig.) . 5 
Note on Axisymmetric Ortiiogonants. By Sir Thomas Muir, 
LL.D., F.R.S. 21 
Observations on Living Fishes brought by H. M.S. " Challenger " 
from Tropical East Africa to Cape Waters. By J. D. F. 
Gilchrist .......... 23 
Notes on the Development of the Ovule, Embryo Sac, and 
Embryo of Hydnora africana, Thunb. By R. H. Dastur, 
B.Sc. Bombay, F.L.S. (With thirteen Text-figs.) ... 27 
(1) The Permanganate Absorption-Spectrum : A Claim for 
Priority. (2) A Formula for calculating the Uranium 
Spectrum. By James Moir ...... 33 
Colour and Chemical Constitution. Part XIII. — The Calcu- 
lation of the Colour of the Monocyclic Dyes. By 
James Moir ......... 35 
On Br aula Caeca, Nitzsch, a Dipterous Parasite of the Honey Bee. 
By S. H. Skaife, M.A., M.Sc. (With eleven Text-figs.) . . 41 
Note on a Fire - Flint of Strandlooper Origin. By John 
Hewitt. (With Plate I) 49 
A Note on the Use of the South African Clawed Toad in the 
Biological Assay of the Digitalis Series. By J. W. C. 
Gunn . . . . . . . . . .55 
sunspots and earth temperatures. by j. r. sutton . . 57 
Rainfall and the Pressure Gradient. By J. R. Sutton . 61 
Colour and Chemical Constitution. Part XIV. — The Calcu- 
lation of the Colour of the Dicyclic Dyes. By James 
Moir 65 
iii 
