"Having carefully examined the more critical parts, to which my attention has been especially directed, I am free to express my conviction of the great clearness, discrimination, and accuracy of the work, and of its admirable adaptation to its object." _From_ REV. RAY PALMER, D. D., _of Albany_. "I have examined this work with great pleasure, and do not hesitate to say that in my judgment it is greatly superior to any treatise I have seen, in all the essential requisites of a good text-book." _From_ PROF. ROUSSEAU D. HITCHCOCK, D. D., _of Union Theol. Sem., N. Y._ "The task of mediating between science and the popular mind, is one that requires a peculiar gift of perspicuity, both in thought and style; and this, I think, the author possesses in an eminent degree. I am pleased with its comprehensiveness, its plainness, and its fidelity to the Christian stand-point." _From_ PROF. HENRY B. SMITH, D. D., _of the Union Theol. Sem., N. Y._ "It commends itself by its clear arrangement of the topics, its perspicuity of language, and its constant practical bearings. I am particularly pleased with its views of conscience. Its frequent and pertinent illustrations, and the Scriptural character of its explanations of the particular duties, will make the work both attractive and valuable as a text-book, in imparting instruction upon this vital part of philosophy." _From_ W. D. WILSON, D. D., _Professor of Intellectual and Moral Philosophy in Hobart Free College_. "I have examined the work with care, and have adopted it as a text-book in the study of Moral Science. I consider it not only sound in doctrine, but clear and systematic in method, and withal pervaded with a prevailing healthy tone of sentiment, which cannot fail to leave behind, in addition to the truths it inculcates, an impression in favor of those truths. I esteem this one of the greatest merits of the book. In this respect it has no equal, so far as I know; and I do not hesitate to speak of it as being preferable to any other work yet published, for use in all institutions where Moral Philosophy forms a department in the course of instruction." Transcribers' Notes: Punctuation and spelling were made consistent when a predominant preference was found in this book; otherwise they were not changed. Simple typographical errors were corrected; occasional unbalanced quotation marks retained. Ambiguous hyphens at the ends of lines were retained. This text spells "gauge" as "guage" in all but one instance; none changed here. Page 34: "by a break put on" perhaps should be "brake". Page 40: "conveyed upwards fourteen" probably should be "conveyed upwards of fourteen". Page 70: "the prepare surfaced" probably is a misprint for "surface". Page 83: "re-agents" was printed that way. Page 197: "distil" was printed that way. Page 208: "metropolitian" was printed that way.