CONTENTS. V 



The I icciirrciicc <it Baclrriuiii iampcstrc (Pam.) Sm., in South 

 Africa: E. M. Duiuc.E, M.A., D.Sc, F.L.S. (Plates 8-11 and 



ihrec -text tigures) -tu' 



Transition from Elementary Algebra to the Calculus, without infi- 

 nite series: Prof. W. 5vT. Rosevk.xrk, ]\LA 410 



South African Homoptera 417 



The a.s^glutination test ; with Particular Reference to its use in the 

 Control of Contagious Abortion in Cattle: E. ^I. Robinson. 



.AI.R.C.V.S V>^ 



Portland Cement 4-.^ 



South African Hepaticie, or Liverworts: T. R. Sim, F.R.H.S. ... 426 

 Radioactive minerals in South Africa : Prof. P. D. Hahn, M.A., 



Ph.D. (Plates 12-14) 44U 



Comet igi66 452 



The masses of visual binar\- stars: R. T. A. Innes, F.R.A.S., F.R.S.E. 453 



Carbon bisulphide and plant growth ... ... 473 



The influence of the climatic and tellurical factors on the distribution 

 and spread of certain animal diseases, with special reference to 

 the conditions occurring in South Africa: D. Kehoe, M.R.C.V.S. 474 



Hydrocyanic acid in sorghum Sd 



Rhodesian Ruins and Native tradition : Rev. S. S. DoRNAN, M.A., 



F.R.G.S.. F.G.S. (Plates 15-18) 502 



A factor in the evolution uf plants : Prof. H. A. Wager, A.R.C.S.. . . 517 

 Game and bird protection in South Africa: a short comparison with 



some other countries : A K. Haagner, F.Z.S 5^9 



Tobacco ash - • • • S-9 



r^ledical insi^ection of schools in relation to social efficiency : C. F. L. 



Leipolut, F.R.C.S., L.R.C.P 5.5o 



"Loog-as'"; or, the ash of the alkali bush: A. Stead, B.Sc, l^C.S. 540 



Martian Seas 542 



A new smut on Sorghum halcpcnsc Nees : L B. Pole Evans, M.A., 



B.Sc, F.L.S. (Plate 19) 543 



Die-back of apple trees, caused by Cytospora leucostoma (Pars.). 

 Sacc. : P. A. van der Bvl, M.A., D.Sc, F.L.S. (Plates 20-25 and 



four text figures) 545 



Status of chemists 557 



Ostrich chick diseases : J . Walker. :\I.R.C.V.S. {Abstract) 558 



.Icokanthera venenata 560 



The Kgoma, or initiation rites of the Bapedi of Sekukuniland : Rev. 

 N. Roberts and C. A. T. Winter. (Plate 26 and three text 



figures) 56 f 



Use of blood in Ijread . ._ 57^ 



The mineral spring on the farm Rietfontein,. District Brandfort, 



O.F.S. : Prof. M. M. Rindl, Ing.D. {Abstract) 579 



Organisation of Science 588 



The simplification of English: Prof. A. S. Kidd, M.A 589 



Cattle ranching in Rhodesia 594 



South African asbestos 594 



Professor P^reud's psycho-pathological theories : G. T. Morice, K.C, 



B.A 595 



Notes on the habits of a few trap-door spiders found in Alicedale, 



Cape Province : F. Cruden (Plates 27-28) 601 



Scientific research in South Africa . . . _ 611 



On the variability in the nature or temperament of wild animals in 

 captivity ; with special reference to South African species ; 



A. K. Haagner, F.Z.S 612 



African Native Melodies: Rev. W. A. Norton. B.A., B.Litt 619 



On the gamma, or factorial function : Prof. W. N. Roseveare, M.A. 629 



Phvsic;ii Chemistry ^47 



Note on the genus ConiotJiccinin Cnrda : with special reference to 

 Coniolhccium ehomaiospurnni Corda: P. A. van der Bvl, M.A., 



D.Sc, F.L.S. (Plates 29-34 and two text figures) 649 



A critical examination of the methods used for countmg in elections 

 by the single transferable vote: J. Brown, M.D., CM., F.R.CS., 

 L.R.C.S.E 658 



