DURING the past few years, the possibilities of soil erosion in Great Britain have been in question owing to the immense loss of good farmland in large areas of the United States, Canada, and many tropical countries as the result of the exhaustive systems of farming carried on during past years. The very heavy rainfall of exceptional intensity on two days this autumn in Devon has enabled us to obtain some idea of the possible intensity of soil erosion under the systems of cultivation of south-west England.