566 Report S.A.A. Advancement of Science. 



" Modjadje " : A Native (^ueen in Northern Transvaal. — 



Rev. F. Reuter. 

 Infectious Experiments with Uredo Graminis, Pers. — J. B. 



Pole Evans, B.Sc. 

 Features in the Vegetation in South Africa due to Prevailing 



Winds.— Dr. R. Marloth, M.A. 

 Sunrise Moisture and Growth. — Col. H. R, Rawson, C.B., 



R.E. 

 Somabula Diamond Field of Rhodesia. — F. P. Mennell, F.G.S. 



Friday, July 13TH. 



Immunity in Certain Wheats to Rust. — J. B. Pole Evans, 



B.Sc. 

 The " Black Rust" of Wheat, etc.— J. B. Pole Evans, B.Sc. 

 Death Feigning in Ostriches. — Prof. J. E. Duerden, Ph.D., 



A.R.C.S. 

 The " Black Spot " Disease on Apples and Pears. — J. B. Pole 



Evans, B.Sc. 

 Some South African Cycads : their Habitats, Habits and 



Associates.— Prof. H. H. W. Pearson, M.A., F.L.S. 

 Notes on the Systematic Description of the Transvaal 



Amaryllids. — Miss R. Leendertz. 

 Petrography of the Rocks surrounding the Diamond Pipes of 



the Kimberley District.— R. H. Restall, :\I.A., F.G.S. 



Section C. 

 Tuesday, July ioth. 



President's Address by Sidney J. Jennings, M.I.M.E., 



M.Amer. I.M.E., M.I.M.M.' 

 The Realm of Alfalfa.— S. Hodder. 

 Smoke Abatement in Mining Centres. — Arthur H. Reid, 



F.R.I.B.A. 

 South African Horticulture. — T. R. Sim. 

 The Arnold-Bragstad-La Cour Polycyclic System of Current 



Distribution. — Prof. H. Bohle. 

 An Underground Traverse. — A. E. Payne, A.R.S.M. 



Wednesday, July iith. 



Further Experience in the Bacterial Treatment of Sewage. — 



J. C. S. Beynon, A.M.I.C.E. 

 Irrigation in Egypt and in South Africa. — F. A. Hurley. 

 Water Rating.— G. W. Herdman, M.A., M.I.C.E. 

 Farm Irrigation in the Transvaal. — C. D. H. Braine, 



A.M.I.C.E. 

 Power Generation and Distribution. — R. A. Dawbarn. 

 Irrigation and Inter-Colonial Co-Operation. — W. L. Strange. 

 Theoretical Investigations regarding Ferro-Concrete. — :H. 



Kestner. 



