Part 1 Introduction: Frank Law and the Stocks Reservoir controversy; Frank Law's studies; the plynlimon catchment results; the Plynlimon forest lysimeter; the Thetford micrometeorological and soil physical studies. Part 2 Physics and physiology of evaporation: the Dalton equation; the "del" approximation and the combination equation; the Penman equation; physiological resistance - the Penman-Monteith equation. Part 3 The interception process: the rutter interception model; the stochastic interception model. Part 4 Further transpiration studies in the uplands. Part 5 Rainfall interception from short vegetation - the "wet surface" lysimeter experiment. Part 6 Gamma - Ray Attenuation studies of rainfall interception from forests. Part 7 Plastic-sheet net-rainfall gauge measurements of forest interception. Part 8 Evaporation from snow covered vegetation. Part 9 Predicting the effects of land use change - evaporation models. Part 10 Implications of upland afforestation - a case study, Crinan canal.