Percivall Pott (1714-1788) and chimney sweepers' cancer of the scrotum.

including incidentally an excellent account of the toxicology of dinitro-ortho-cresol. Once the reader has mastered this different approach he will find that the authors have considered many aspects of industrial toxicology from the essential angle of their biochemical origin, an approach which must surely form the fundamental basis of this subject in future. At present there is just sufficient knowledge for a start to be made and the authors have carried out their difficult enterprise extremely well.