iv CONTENTS. 



PAGE 



Bartholomieu Dias's furthest east: Prof. E. H. L. Schwarz, 



A.R.C.S., F.G.S 103 



Lime cartridges for shattering rocks 107 



Gale's comet I0 7 



The oxygraph 107 



Farming by dynamite : W. Cullen, M.I.M.M 108 



triphosphate IIX 



Poisoning by pine-apples m 



Bergson's conception of time: Rev. S. R. Welch, B.A., D.D., Ph.D. 112 

 Some notes concerning a deep bore at Zwartkops, near Port 

 Elizabeth, and the resulting thermal chalybeate spring: G. W. 



Smith, A.M. I.C.E. (Plate 3). IJ 9 



Modern tendency of physical science 127 



Transvaalia : a new planet . . 13 1 



The formation of chemical compounds in homogeneous liquid 

 systems : a contribution to the theory of concentrated solutions : 



Prof. R. B. Denison, M.A., D.Sc, Ph.D. (Six text figures) .. 132 



A new vegetable oil ' • ■ • • 14/ 



Electrolysis of water with carbon electrodes : E. G. Bryant, 



B.A., B.Sc . . 118 



Preliminary list of flowering plants, ferns, and fern allies, found in 



the Port Elizabeth District: I. L. Drege 151 



Social life in a South African tribe 175 



The salt pans of the coast region : W. G. S. Stead 176 



Cluytia similis 181 



Stomata and drought resistance in mealies : H. A. Wager, A.R.C.S. 183 



Electrical illumination 185 



Laccolites and bysmalites : Prof. E. H. L. Schwarz, A.R.C.S., F.G.S. 186 

 Poisonous properties of Mesembrianthemum Mahoni. N.E.Br.: 



J. Burtt-Davy, F.L.S., F.R.G.S 193 



A new Cape buchu 195 



Proto-hydrogen 195 



Methods of sero-diagnosis applicable to diseases of stock in South 



Africa : D. Kehoe, M.R.C.V.S 196 



The minor planet MT 191 1: and on minor planets in general: 



R. T. A. Innes, F.R.A.S 215 



Sir David Gill 222 



Iirigation by sun power in North Africa 222 



A percentage compass dial 222 



Some observations on Convolute roscoffctisis: H. A. Wager, A.R.C.S. 223 



Sir W. H. White 225 



Cape wine levures, and their use in wine making : a preliminary 



study: A. L Perold, B.A., Ph.D 226 



Transmutation of Elements 243 



On veins and inclusions in the Stellenbosch granite : Prof. S. J. 



Shand, D.Sc, Ph.D. (Plates 4, 5 and 6) 247 



South Africa — and the undergraduate: A. E. Griffith!), M.A 252 



Pi eservation of Timber 262 



Hydrolysis of sugar by ultra-violet rays 262 



Is silica an indispensable constituent of plant food? M. Lundie .. 263 

 On the effects of the bite of certain opisthoglvphous snakes : W. H. 



Andrews, M.R.C.V.S " 269 



Antarctica: Prof. E. J. Goddard, B.A., D.Sc 279 



Tsumcbite : a new mineral 287 



A comparison of Municipal elections under the present svstem and 

 under the transferable vote: J. Brown, M.D., CM.,' F.R.C.S., 



L.R.C.S.E 288 



The British Association 296 



A new minor planet 296 



Mesothorium 296 



Th~ limits of science in the material universe: O. Middleton 



A R.I.B.A 297 



