This book is designed primarily to be used as a laboratory guide in connection with courses in organic chemistry in which the student follows in the laboratory the subject as developed in the class-room. An attempt has been made to furnish direc tions for experiments to illustrate the methods of preparation and the chemical properties of the more important classes of organic compounds. As a consequence, the student following the work as given, comes in contact with many substances of importance which are not handled by one whose laboratory work consists solely in the preparation of a few compounds. For example, directions are given in considerable detail for experiments which illustrate the properties of fatty amines, hydroxy acids, carbohydrates, fats, proteins, etc., subjects which receive scant, if any, attention in many laboratory courses in organic chemistry.

Directions for a large number of preparations are also given. These serve to illustrate the more important synthetic methods and the different kinds of laboratory technique with which the student should become acquainted. In connection with the directions for the preparation of typical compounds, experiments are given which illustrate the properties of the compounds made. These experiments include in each case a study of the reactions of the substance which are Of particular value in the identification of the characteristic group present.

N o attempt has been made to introduce novel preparations; the ones given are, in the main, those commonly used. These have been selected on account of their simplicity and the fact that they illustrate the principles to be taught; they are as novel to the student as any that could be devised. Although the older preparations are used, the laboratory details are, in many cases, different from those commonly employed. The changes have been the result of a detailed study of the preparations which, in many cases, resulted in simplification and improvement. A few new preparations are described; these are to illustrate, in most cases, the properties of compounds that have not been stud ied commonly in laboratory courses in organic chemistry.

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