Hydrological Research Division, Dept. of Water Affairs, Pretoria, Republic of S. Africa: The following papers were issued in 1967 by the Division:- No. 38. Aerial spraying of the Vaal Dam to control evaporation — M.D. Bester No. 39. Effects of catchment management on river flow characteristics — J.S. Whitmore No. 40. The influence of locality factors on mean annual rainfall — J.S. Whitmore No. 41. Water law in the Republic of South Africa — G.A.R. Dowling No. 42. Apportionment of water for agricultural purposes in South Africa — A.H. Barry and M.J. Le Roux No. 43. Effect of geology on the choice of structures for the conservation of water in Southern Africa — F.C. Truter and J.P. Kriel