CdNTKNTS. V 



PAGfe. 



Examination of the bark and seed oil of Trichilia emetica : J. S 



Jamieson, F.I.C. F.C.S 496 



Cosmic evolution 498 



The Ccdara Plantation: J. S. Henkel 499 



A short note on Hryophyta of South Africa: T. R. Sim (Precis) 505 

 Note on Pol^porus lucidus Lcyss-, and its effect on the wood of the 



willow:"?. A. VAN DKR Hvi.. M.A.. T>.Sc.. F.T..S. (PUitcs ^2-\t 



and six text figures) 5o^> 



Ground rainbows 515 



The progress of the Xatal sugar industry from its incci)ti()ii in 1851 



up to 1915 : W. p. TiTKER 516 



British Assc^ciation 520 



Vocational Training: R. T- A. Ixkes, I-'.R.S.F... I'.R.A.S. {./^n^cis) 521 



Conference of Scientific Societies 521 



Comet 1917a 527 



Geology and the war 527 



The medicinal springs of South Africa: Prof. M. M. Rixni.. Ing.D. 



(zi'tth map and two scries of tables) 528 



Transmission of sound waves 552 



Some financial features of the Canadian educational system : Rev. \V. 



Flixt, D.D 553 



Finely powdered Mercuric chloride (TTgCU) for the destruction of 



the Argentine ant, Iridomvniicx Iiiiinilis Mavr. : C. W. Maixv. 



M.Sc. F.E.S. F.L.S. ....'. '. 565 



Geology of South-West Africa 567 



Potash from seaweeds 567 



Rock Paintings of the Northern Transvaal: Rev. N. Roberts (Plates 



17-22) 568 



Variation in A ga rat urn con\zoidcs (Family Compositie) : S. G. Rich. 



M. A.. B.Sc 574 



Fire-resisting building construction: W. J. Delbridge, A.R.I.B.A. 



(Title only) 575 



Standards and standard methods in the analysis of food and drugs : 



J. S. Ja.mieson, F.LC. F.C.S. (Title only) 575 



Wattle growing : its effect on the wattle-insect problem : C. B. 



Hardenberg, M.A. (Title only) 575 



The farming industry in Natal: Rev. J. Scott (Title only) 575 



On certain remarkable resemblances between the formation of 



images and colour-vision in man and certain vertebrate animals : 



G. Lixdsay Johnson, M.A., M.D. (Title only) ... 575 



A bacterial blight of pear blossom : Miss F. 'SI. Doidge, ?kI.A.. D.Sc. 



F.L.S. ( Title only) 575 



Trade Schools as aids to industry: Prof. J. Or]<, B.Sc, M.I.C.E. 



M.I.Mech. E. (Plates 27,-27 and one text figure) 576 



.A preliminary account of some breeding experiments with fox- 

 gloves: Prof. E. Warren, D.Sc. (Title only) 598 



Note on the eversion of the ptilinum during the emergence of the 



house fly, Musca domestica Linn. : C. W. Mallv, M.Sc, F.E.S. , 



F.L.S . 5<)<^J 



.\n account of the chief types of vegetation in South .Africa ; with 



notes on the plant succession : Prof. J. W. Bews, M.A., D.Sc. 



( Title only) 599 



Commercial afforestation in South Africa: T. R. Sim (Tille only) 599 

 The respiratory organs of dragon-fly larvae: S. G. Rich, .ALA., B.Sc. 6co 

 The association of game with tsetse-tlv disease in domestic animals 



in Zululand: D. T. Mitchell. M.R.C.V.S. (Title only) 602 



.\ bacterial spot of citrus: Miss E. M. Dohigk, M..-\.. D.Sc, F.L.S. 



( Title only) fo-' 



Citrus canker n South .\irca: Miss E. >f. DurPGE.M. A., D.Sc, F.L.S. 



(• Title only) 602 



