Volume 12, 1973Number 1Presidential Address (pages 1-5)Anderton, P.W. The significance of perennial snow and ice to the water resources of the South Island, New Zealand (pages 6-18)Eyles, R.J. Drainage density representation on Wellington maps (pages 19-31)Selby, M.J.; Hosking, P.J. The erodibility of pumice soils of the North Island, New Zealand (pages 32-56)Martin, G.N. Characterization of simple exponential baseflow recessions (pages 57-62)News (pages 63-65)Number 2 Editorial (pages 69-70)Healy, J.; Hochstein, M.P. Horizontal flow in hydrothermal systems (pages 71-82)Coulter, J.D. A water balance assessment of the New Zealand rainfall (pages 83-91)James, I.L. Mass movements in the upper Pohangina Catchment, Ruahine Range (pages 92-102)Wilson, D.D.