A JOINT meeting of the Geological Society and the Institution of Water Engineers was held on April 19, under the chairmanship of Prof. W. G. Fearnsides, to discuss "Water in Relation to Town and Country Planning". As proposed by the chairman in his introduction, the meeting was mainly confined to a consideration of sources of water and their relation to development in Great Britain. The meeting attracted a notable attendance and produced a vigorous discussion. In addition to Prof. Fearnsides and Mr. S. R. Raffety, chairman of the Institution of Water Engineers, who briefly introduced the discussion on behalf of the water engineers, there were fifteen other speakers. They covered a wide range of topics which will be considered in order, though it may be noted at the outset that many of the outstanding aspects were indicated by Prof. P. G. H. Boswell in a well-considered opening on behalf of the geologists.