CONTENTS. 



Papeks Read : — page 



" On the Vohxmttric Determination of Phosphoric Oxide," 



byB. de C. Marchand, B.A., D.Sc. ... ... ... 259 



"' Some Further Factors influencing the Solubility of 

 Phosphoric Oxide in Mixed Fertilisers containing 

 Superphosphates," by Edmund Victor Flack ... 268 



• • South African Fern Notes, Avith List of Ferns and Fern- 

 Allies found in Southern Rhodesia, and of Additional 

 Species recorded for other South African Phytographic 

 Areas," by T. R. Sim, D.Sc, F.L.S. ... ... 275 



'' The Leaves of Iluhca pectinatu and II. suaveolens," by 



Horace A. Wager, A.R.C.Sc. ... ... ... 284 



" Note on the I-Kowe or Natal Kafir Mushroom, Schuheiia 

 Umkoicaan," by Paul A. van der Bijl, M.A., D.Sc, 

 F.L.S. ... ... ... ... ... ... 286 



"A Paw-Paw Leaf-Spot caused by a Phyllosticta sp.," by 



Paul A. van der Bijl, M.A., D.Sc, F.L.S. ... ... 288 



" An Exhibit of Stone Implements from Tiger Kloof and 



Taungs, Cape Colony," by Rev. Neville Jones, F.E.S. 2[)0 



" Some Factors in the Natural Control of the Wattle 



Bagworm." by S. H. Skaife, M.A., M.Sc. ... ... 291 



" Map of South Africa, showing the chief Native Languages 



and Dialects," by Rev. G. Beyer ... ... ... 302 



" Notes relating to Aboriginal Tribes of the Eastern 



Province," by John Hewitt, B. A. ... ... ... 304 



" The Economic Value of a Study of the Nematodes, with 

 Remarks on the Life History of Heterodera in South 

 Africa," by J. Sandground, M.Sc, ... ... ... 322 



" Hottentot Place-Names, ' by Rev. Cliarlcs Pettman ... 334 



" Snake- Venom and its Effects, especially on other Snakes," 



by F. W. FitzSimons, F.Z.S., F.R.M.S. ... ... 353 



Index ... ... ... ... ... ... ... 355 



E. H. Adlin&ton, Ltd., Printers, Johaimesbur?— 10436 



