This little manual covers a range of subjects important to the practical physician, and it aims to supplement current medical teaching in some of the details in which it is admittedly deficient. The ordinary course is followed, the parts of a prescription, the weights and measures commonly used, the language and abbreviations and grammatical construction being described with some detail. The different classes of preparations, with examples of prescriptions for powders, pills, mixtures, liniments, and the various forms of medicine intended for external use are then described. A discussion of doses, the metric system, the combination of medicines and incompatibilities completes the work. The utility of the work is unquestioned, and it will repay careful study by any one who appreciates the need of elegance and accuracy in the important matter of prescription writing. The book has been revised to accord with the latest revision of the Pharmacopeia, but we