-CONTENTS. :V 



• ■ ■. PAGE. 



StenoKraphy as an aid to tlie phonetic an;i.lysis and comparison of 



African languages : Rev. W. A. Norton, B.A., B.Litt 421 



Hermaphroditism in ilctaiiastria ("ithyocaiiipa Cram.: F. W. Pi-:ttey, 



B.A. (Plate 12) 4^3 



The respiratory rectum of the Nymph of Mesogomphiis (Odonata) : 



S. G. Rich, M.A., B.Sc. (with eislif text fif^urcs) 426 



Problems in terrestrial physics that require the attention of South 

 African physicists : Prof. J. T. Morrison, M.A., B.Sc, F.R.S.E., 



A.M.T.E.E 433 



Ctn-vilinear space 438 



Plant toxins, a cause of infertility in soils: A South African 



observation: A. Stead, B.Sc, F.C.S. (Plate 13) 439 



Hay fever 442 



Light-absorbing matter in space 442 



Notes on fibre produced from some of the most useful indigenous 



and exotic plants in the Cape Province: J. Leightox, F.R.H.S. 44.3 

 The movement towards a national system of technical education : 



W. J. HoRNK. A.M. I.C.E., A.M.T.E.E 445 



South African Museum 452 



The respiratory organs of a Notonectid; S. G. Rich, AI.A., B.Sc... 455 



South African ^[yxomycetes : Miss A. V. Duthie, M.A 456 



The decimal system : Money, weights, and measures ; \V. J. Horne, 



A.M.I.C.E., A.M.T.E.E. 462 



Tonisation of gases and the absorption of X-rays : L. Simons. B.Sc. 



( Title only ) 464 



The plough: W. S. H. Cleghorne, B.Sc, A.M.I.Mech.E. (Title 



only) 464 



Mechanical refrigerators: li. W. Bull (Title only) 464 



Simple expedients in experimental chemistry: Prof. B. de St. J. 



VAN DER Riet, M.A., Ph.D. (Title only) ... 464 



Note on a new genus of Copepoda from a fresh-water fish : Prof. 



E. J. GoDDARD, B.A., D.Sc. (Title only) 464 



A plea for greater attention to physiology in the teaching of zoology: 



Prof. E. J. GoDDARD, B.A., D.Sc (Title only) 464 



Description of a bacterium which oxidises arsenite to arsenate, and 



of one which reduces arsenate to arsenite, isolated from a cattle- 

 dipping tank: H. H. Green, D.Sc, F.C.S. (Abstract) 465 



The classilication and affinities of the Hirudinea : Prof. E. J Goduard, 



B.A.. D.Sc (Title only) 467 



Some field results of fertilising maize: J. F. W. Gathered (Title 



only) . . . 467 



The Hemichordata and their significance in relation to the Inverte- 



brata and Chordata : Prof. E. J. Goddard, 13. A., D.Sc. (Title 



only) 467 



Note on the origin of Metamevism : Prof. E. J. Goddard, B.A., D.Sc. 



( Title only) 467 



The grain bug, or Stinkulieii (Blissus diplopterus Dist.) : C. W. 



Mally, M.Sc, I\L.S.., F.E.S. (T///^ oH/i-) 467 



TJnseed oil as an insecticide : C. W. Mally, M.Sc, F.L.S., F.E.S. 



( Title only) 467 



Our language and tlie native pupil : S. G. Rich, M.A., B.Sc 468 



Grey College Herbarium 471 



Upon the fate of arsenic after ingestion by and injection into live- 

 stock, and after absorption through the skin in dipping: H. H. 



Green, D.Sc, F.C.S. (Abstract) 472 



Nebulae and Nov^e 473 



Note upon the analysis of soda-sulphur dips: B. J. ITill (Abstract) 474 



Bantu mentality 476 



Binet-Simon tests on Zulus : S. G. Rich, M.A., B.Sc 477 



The grasses of the Eastern coast belt available for the manufacture 



of paper: C. F. Juritz, M..A., D.Sc, F.T.C. (Title only) 482 



