PREFACE.
Reading edition
Between those works on Art which are too costly, or too old to be useful now,—those, which are too comprehensive or prolix—and those, which teach nothing,—it was suggested to the Author, that an investigation and simple arrangement of the Principles on which he has hitherto successfully taught, with useful results, would form a Practical Treatise, calculated to abridge the labours and shorten the road of the Student, by its available suggestions.