"FOURTEEN WEEKS" IN NATURAL SCIENCE. A BRIEF TREATISE IN EACH BRANCH These volumes constitute the most available, practical, and attractive text-books on the Sciences ever published. Each volume may be completed in a single term of study. THE FAMOUS PRACTICAL QUESTIONS devised by this author are alone sufficient to place his books in every Academy and Grammar School of the land. These are questions as to the nature and cause of common phenomena, and are not directly answered in the text, the design being to test and promote an intelligent use of the student's knowledge of the foregoing principles. TO MAKE Science popULAR is a prime object of these books. To this end each subject is invested with a charming interest by the peculiarly happy use of language and illustration in which this author excels. THEIR HEAVY PREDECESSORS demand as much of the student's time for the acquisition of the principles of a single branch as these for the whole course. PUBLIC APPRECIATION. The author's great success in meeting an urgent, popular need, is indicated by the fact (probably unparalleled in the history of scientific text-books), that although the first volume was issued in 1867, the yearly sale is already at the rate of FORTY THOUSAND VOLUMES. PHYSIOLOGY AND HEALTH. 9 ELEMENTS OF PHYSIOLOGY, JARVIS' PHYSIOLOGY AND LAWS OF HEALTH. The only books extant which approach this subject with a proper view of the true object of teaching Physiology in schools, viz., that scholars may know how to take care of their own health. The child instructed from these works will be always HIS OWN DOCTOR. "Consider the Lilies." BOTANY. WOOD'S AMERICAN BOTANIST AND FLORIST. This new and eagerly expected work is the result of the author's experience and life-long labors in CLASSIFYING THE SCIENCE OF BOTANY. He has at length attained the realization of his hopes by a wonderfully ingenious process of condensation and arrangement, and presents to the world in this single moderate-sized volume a COMPLETE MANUAL. In 870 duodecimo pages he has actually recorded and defined NEARLY 4,000 SPECIES. The treatises on Descriptive and Structural Botany are models of concise statement, which leave nothing to be said. Of entirely new features, the most notable are the Synoptical Tables for the blackboard, and the distinction of species and varieties by variation in the type. Prof Wood, by this work, establishes a just claim to his title of the great AMERICAN EXPONENT OF BOTANY. STANDARD NATIONAL HISTORY. TEXT-BOOKS SERIES. History is Philosophy teaching by Examples." THE UNITED STATES. 1. Youth's History of the UNITED STATES. BY JAMES MONTEITH, author of the National Geographical Series. An elementary work upon the catechetical plan, with Maps, Engravings, Memoriter Tables, etc. For the youngest pupils. 2. Willard's School History, for Grammar Schools and Academic classes. Designed to cultivate the memory, the intellect, and the taste, and to sow the seeds of virtue, by contemplation of the actions of the good and great. 3. Willard's Unabridged History, for higher classes pursuing a complete course. Notable for its clear arrangement and devices addressed to the eye, with a series of Progressive Maps. 4.. Summary of American History. A skeleton of events, with all the prom inent facts and dates, in fifty-three pages. May be committed to memory verbatim, used in review of larger volumes, or for reference simply. "A miniature of American History." ENGLAND. 1. Berard's School History of England, combining an interesting history of the social life of the English people, with that of the civil and military transactions of the realm. Religion, literature, science, art, and commerce are included. 2. Summary of English and of French History. FRANCE. A series of brief statements, presenting more points of attachment for the pupil's interest and memory than a chronological table. A well-proportional outline and index to more extended reading. ROME. Ricord's History of Rome. A story-like epitome of this inter esting and chivalrous history, profusely illustrated, with the legends and doubtful portions so introduced as not to deceive, while adding extended charm to the subject. GENERAL. Willard's Universal History. A vast subject so arranged and illustrated as to be less difficult to acquire or retain. Its whole substance, in fact, is summarized on one page, in a grand "Temple of Time, or Picture of Nations. . 2 General Summary of History. Being the Summaries of American, and of English and French History, bound in one volume. The leading events in the histories of these three nations epitomized in the briefest manner. A. S. BARS PUBL O., |