THE popularity of spot methods of analysis is evident not only from the increasing number of text-books dealing with this section of microchemistry but, more particularly, from the fact that in the course of seven years three editions of Prof. Feigl's authoritative treatise have been called for, while, in addition, there have been English and Russian translations. To each edition subsequent to the first there have been made numerous additions, and this third German edition contains many new tests, some of which have not hitherto been published. The theoretical part of the book has also been enlarged, not only by the amplification of many of the original chapters, but also by the inclusion of chapters dealing with fluorescent analysis and spot tests, and the influence of substitution on solubility. Qualitative Analyse mit Hilfe von Tüpfelreaktionen: Theoretische Grundlagen, Praktische Ausführung und Anwendung. Von Dr. Fritz Feigl. Dritte neu bearbeitete Auflage. Pp. xii + 554. (Leipzig: Akademische Verlagsgesellschaft, m.b.H., 1938.) 30 gold marks. An Introduction to Microchemical Methods: for Senior Students of Chemistry. By Dr. Cecil L. Wilson. Pp. xi + 196. (London: Methuen and Co., Ltd., 1938.) 7s. 6d.net.