In order to review this book properly, one should trot out a whole section of it to display its scope. Dr. Cowdry, in his preface to the first edition, announced the purpose of the book for "workers in biology and medicine interested in the minute structure of living things." The book has actually evolved to a breadth and usefulness far surpassing such a modest description.
In a very fine first section are most of the general approaches to biologic methods of research, followed by a brief authoritative explanation of standardization of stains by Dr. H. J. Conn. From here the book is actually an encyclopedia in the best meanings of the word. Although the entries are called "Techniques" they include lucid definitions, tables, "recipes," and company sources for items difficult to find or prepare, liberal but not exhausting cross-references, and plentiful source references for guidance into related or controversial subjects.