"The proof of the merits of a textbook, is found in the crucible of the class-room work. There are many chemistries, and good ones; but, for our use, this leads them all. It is stated in language plain, interesting and not misleading. A logical order is followed, and the mind of the student is at work because of the many suggestions offered. We use Williams's work, and the results are all we could wish. There is plenty of chemistry in the work for any of our high schools." W.J. Martin, Professor of Chemistry, Davidson College, N.C.: "One of the most admirable little text-books I have ever seen." T.H. Norton, Projessor of Chemistry, Cincinnati University, O.: "Its clearness, accuracy, and compact form render it exceptionally well adapted for use in high and preparatory schools. I shall warmly recommend it for use, whenever the effort is made to provide satisfactory training in accordance with the requirements for admission to the scientific courses of the University." CHEMICAL EXPERIMENTS General and Analytical. By R.P. WILLIAMS, Instructor in Chemistry, English High School, Boston. 8vo. Boards. xv + 212 pages. Fully illustrated. Mailing price, 60 cents; for introduction, 50 cents. This book is for the use of students in the chemical laboratory. It contains more than one hundred sets of the choicest illustrative experiments, about half of which belong to General Chemistry, the rest to Metal and Acid Analysis. Great care has been taken to describe accurately and minutely the methods of performing experiments, and in directing pupils to observe phenomena and to explain what is seen. The work is amply illustrated and is replete with questions and suggestions. Blank pages are inserted for pupils to make a record of their work, for which careful directions are given, with a model, laboratory rules, tables of solubilities, etc. A new feature is the supplementary and original work, vhich is given at the end of each set of experiments for such pupils as complete the prescribed work ahead of others in the class, and a list of terms to be looked up in some text-book. This gives an elasticity to the book and fits it for use in schools where much time is devoted to chemistry, as well as in the most elementary classes in labortttory work. Another original feature which it is believed will be heartily welcomed by teachers is the method of treating Metal Analysis successfully used by the author for several years. Briefly, the aim of this book is to aid the pupil to do, to observe, to explain, to record, aud thus to learn the essentials of chemistry. LABORATORY MANUAL OF GENERAL CHEMISTRY By R.P. WILLIAMS, Instructor in Chemistry, English High School, Boston. 12mo. Boards. xvi + 200 pages. by mail, 30 cents; for introduction, 25 cents. The book contains one hundred experiments in general chemistry aNd qualitative analysis, blanks opposite each for pupils to to take notes, laboratory rules, complete tables of symbols, with chemical and common names, reagents, solutions, chemicals, and apparatus, and the plan of a model laboratory. AN ELEMENTARY CHEMISTRY By GEORGE R. WHITE, Instructor in Chemistry at Phillips Academy, Exeter. 12mo. Cloth. xxix + 272 pages. Mailing price, $1.10; for introduction, $1.00. This is an excellent text-book for High Schools and Academies, and for elementary classes in Colleges. The strictly inductive method here followed, together with the insertion of numerous questions that must cause the student to do his own reasoning from the observations, renders this book particularly useful. T.H. Norton, Professor of Chemistry, University of Cincinnati, Cincinnati, Ohio.: "I am greatly pleased with the plan and its execution. It is an admirable arrangement for our inductive course in chemistry and should not fail to yield good results." A STUDENTS' MANUAL OF A LABORATORY COURSE IN PHYSICAL MEASUREMENTS By Wallace C. Sabine, Assistant Professor of Physics, Harvard University. 8vo. Cloth. ix + 126 pages. Mailing price, $1.35; for introduction, $1.25. This manual, which is intended for use in supplementing college courses in physics, contains an outline of seventy experiments, arranged with special regard to a systematic and progressive development of the subject. Le Roy C. Cooley, Professor of Physics, Vassar College: "I have examined it and am ready to commend it." J.F. Woodhull, Professor of Sciences, Teachers' College, New York: "I find Sabine's Laboratory Manual a thoroughly good thing." HIGH SCHOOL LABORATORY MANUAL OF PHYSICS By Dudley G. Hays, Charles D. Lowry, and Austin C. Rishel, Teachers of Physics in the Chicago High Schools. 8vo. Cloth. iv + 154 pages. Mailing price, 60 cents; for introduction, 50 cents. This manual has been written: First, to present a logically arranged course of experimental work covering the ground of Elementary Physics. Second, to provide sufficient laboratory work to meet college entrance requirements. The experiments are largely quantitative, but qualitative work is introduced. W.S. Jackman, Teacher of Science, Cook Co. Normal School, Englewood, Ill.: "It is a most excellent manual, and I believe it meets the needs of high schools on this subject better than any other book I have seen." YOUNG'S LESSONS IN ASTRONOMY Including Uranography. Revised Edition. By CHARLES A. YOUNG, Professor of Astronomy in the College of New Jersey. 12mo. Cloth. Illustrated. ix + 357 pages, exclusive of four double-page star maps. By mail, $1.30; for introduction, $1.20. The revised edition of this book has been prepared for schools that desire a brief course free from mathematics. It is based upon the author's Elements of Astronomy, but many changes of arrangement have been made. In fact, everything has been carefully worked over and re-written to adapt it to the special requirements. Great pains has been taken not to sacrifice accuracy and truth to brevity, and no less to bring everything thoroughly down to date. The latest results of astronomical investigation will be found here. The author has endeavored, too, while discarding mathematics, to give the student a clear understanding and a good grasp of the subject. As a body of information and as a means of discipline, this book will be found, it is believed, of notable value. The most important change in the arrangement of the book has been in bringing the Uranography, or constellation tracing, into the body of the text and placing it near the beginning, a change in harmony with the accepted principle that those whose minds are not mature succeed best in the study of a new subject by beginning with what is concrete and appeals to the senses, rather than with the abstract principles. Brief notes on the legendary mythology of the constellations have been added for the benefit of such pupils as are not likely to become familiar with it in the study of classical literature. N.W. Rarrington, President of University of Washington, Seattle, Wash., formerly chief of the U.S. Weather Bureau, Washington, D.C.: "I shall take pleasure in commending it to schools requiring an astronomy of this grade. The whole series of Astronomies reflects credit on their distinguished author and shows that he appreciates the needs of the schools." Clarence E. Kelly, Prin. of High School, Haverhill, Mass.: "It seems to me the book is admirably adapted to its purpose, and that it accomplishes the difficult task of presenting to the student or reader not conversant with Algebra and Geometry, an excellent selection of what may with profit be given him as an introduction to the science of astronomy." YOUNG'S ELEMENTS OF ASTRONOMY With a Uranography. By CHARLES A. YOUNG, Professor of Astronomy in the College of New Jersey. 12mo. Half leather. x + 472 pages, and four star maps. Mailing price, $1.55: for introduction, $1.40. Uranography. From Youpg's Elements of Astronomy. 12mo. Flexible covers. 42 pages. besides four star maps. By mail, 35 cents; for introduction, 30 cents. This volume is an independent work, and not an abridgment of the author's General Astronomy. It is a text-book for advanced High Schools, Seminaries, and Brief Courses in colleges generally. It was prepared by one of the most distinguished astronomers of the world, a most popular lecturer, and most successful teacher. It had every presumption in its favor, and the event has more than justified expectations. Special attention has been paid to making all statements correct and accurate so far as they go. In the text no mathematics higher than elementary algebra and geometry is introduced; in the foot-notes and in the Appendix an occasional trigonometric formula appears, for the benefit of the very considerable number of High school students who understand such expressions. G.B. Merriman, formerly Prof. of Mathemutics and Astronomy, Rutgers College, New Brunswick, N.J.: "For a short course in elementary astronomy, it is by far the best book I have ever examined." Warren Mann, State Normal School, Potsdam, N. Y.: "Accuracy in use of terms is a marked feature. I consider it the best text-book on this subject." H.N. Chute, High School, Ann Arbor, Mich.: "It is just the book the scholars have been waiting for." G.H. Howe, State Normal School, Warrensburg, MO.: "It is indeed an admirable book, up to the times, clear, and complete." Jeremiah Slocum, South Division High School, C&ugo, Ill.: "It is well adapted both as to scope and manner of treatment to high-school work." Ray G. Huling, Prin. of English High School, Cambridge, Mass.: "It is delightfully fresh, full, and clear." A.S. Roe, recently of High School, Worcester, Muss.: "The book is extended enough to please the exacting teacher." I.P. Bishop, State Normal School, Buffalo, N.Y.: "The book seems to have all the essentials of a first-class text for high school work; viz., conciseness, clearness, and the results of recent research." YOUNG'S GENERAL ASTRONOMY A Text-book for Colleges and Technical Schools. By CHARLES A .