This volume is the authorized translation of part II of "Die Chemische Emissionsspektralanalyse" by Dr. Walther Gerlach and Dr. Werner Gerlach. Adam Hilger Limited, the spectrograph manufacturer, of London, is the publisher and distributer of this translation. If one has spectrographic equipment, expensive though it may be, much of interest and of value may be accomplished in the various fields of study, among which may be listed toxicology of various kinds. Special methods are given for the qualitative and quantitative analysis of organs, secreta and excreta. The use of the spectrograph as applied to electropathology and pneumoconiosis is also described. Other subjects of a general nature are treated. If one does not have spectrographic equipment, the book is without practical value.