THE fundamental error in acne is seborrhcea. Theretis at present a lack of knowledge as to the causation of seborrhoea, but it is known that it is common in adolescence, in disorders of the alimentary tract, and is apparently an inborn peculiarity in some individuals. The symptoms of acne vulgaris are, as we may say, built up on seborrhoea as a basis, and comprise, first, the production of a .h...