f^i *— '*.^\ 



luji LIBRARY No] 



CON TENTS. 



PAGE. 



Ofmljcrs axl) Council ... ... ... ... ... i 



Constitution OF THE AssociATKjx ... ... ... ... ii 



Tables : Past Annual Meetings : — 



Places and Dates, Presidents, Vice-Presidents, and Local 



Secretaries ... ... , . . ... ... xiii 



Sectional Presidents and Secretaries ... ... ... xv 



Evening Discourses ... ... ... ... ... xviii 



STHLLENBOSCH MEETING, 1917:— 



General Meetings ... ... ... ... ... xix 



Officers of Local and Sectional Committees ... ... xx 



Proceedings of F'ifteenth Annual General Meeting of Members xxiii 

 Report of Cotmcil, 1916-17 ... ... ... ... xxviii 



General Treasurer's Account, 1916-17 ... ... ... xxxiii 



Tenth Award of the South Africa Aledal (^ Plate i) ... xxxvi 



.\ssociATioN Library ... ... ... ... ... x.xxix 



Address by the President of the Association : Prof. J. Orr, B.Sc, 



M.LC.E., M.LMech.E. .. ... ... ... ... i 



Address by the President of Section A: Prof. W. N. Roseveare^ 



M.A 33 



Address by the President of Section B : Prof. M. M. Rindl, Ing.D. 48 

 Address by the President of .Section C : J. Burtt-Davy, F.L-S., 



" F.R.G.S 64 



Address by the President of Section D: Rev. B. P. J. Marchand, 



B.A 83 



Address by the President of Section E: Rev. N. Roberts 88 



List of Papers read at the Sectional Meetings loi 



Sea bamboo {Ecklonia huccinalis) as a source of potash: G. F. 



Britten, B.A. {Plates 2-3) 105 



A South African iron industry: prospects and possibilities'. Prof. 



G. H. Stanley, A.R-S.M., M.LM.E., M.LM.M., F.LC 116 



A green sun ^^Z 



The geology of the neighbourhood of Stellenbosch : Prof. S. J. 



Shand. D.Sc. Ph.D., FG.S. (P/a/^.y 4-5 and s'x text figures) 124 



South African Geographical Society 136 



An interesting case of insect mutualism : Rev. N. Abraham, 



f.r.m.s. ... 137 



Theories of Cosmogony 140 



Parallax of the faint proper motion star near Alpha of Centaurus. 



(Preliminary announcement): R. T. A. Tnnes, F.R.A.S.. 



. F.R.S.E. MI 



On the effect of vegetation on the rainfall of South Africa : H. 



Pealing, M.Sc M^ 



An old report on the copper field of Namaqualand : A. W. RnnFRS, 



M.A., Sc.D., F.G.S - 146 



The plant succc-^sion in the Thorn veld : Prof. J. W, Bews, M.A.. 



D.Sc. (Plates 6-g and tzvo text figures) .■ i->3 



Einstein's theory of eravitation i"- 



Markets : P. J. »u Toit t/-! 



Electricity and agriculture _•_ • 17^ 



Xative ideas of cosmology: Rev. S. S. Dornan. M.A., F.G.S. . 



F.R.G-S ^'^^ 



A. GORDON HOWITT . . . 188 



Oriein and meaning of the name "Kottentot": Rev. Prof. J. du 



Plessis. B.A.. B.D ■•• ^89 



Rubber from carbide ^93 



32475 



