4. The most important experiments and those best illustrating the subjects to which they relate, have been selected; but the modes of experimentation are so simple that most of them can be performed by the average pupil without assistance from the teacher. 5. The necessary apparatus and chemicals are less expensive than those required for any other text-book equally comprehensive. 6. The special inductive feature of the work consists in calling attention, by query and suggestion, to the most important phenomena and inferences. This plan is consistently adhered to. 7. Though the method is an advanced one, it has been so simplified that pupils experience no difficulty, but rather an added interest, in following it; the author himself has successfully employed it in classes so large that the simplest and most practical plan has been a necessity. 8. The book is thought to be comprehensive enough for high schools and academies, and for a preparatory course in colleges and professional schools. 9. Those teachers in particular who have little time to prepare experiments for pupils, or whose experience in the laboratory has been limited, will find the simplicity of treatment and of experimentation well worth their careful consideration. Those who try the book find its merits have not been overstated. A. B. AUBERT, _Prof. of Chemistry, Maine State College, Orono, Me._: All the salient points are well explained, the theories are treated of with great simplicity; it seems as if every student might thoroughly understand the science of chemistry when taught from such a work. H. T. FULLER, _Pres. of Polytechnic Institute, Worcester, Mass._: It is clear, concise, and suggests the most important and most significant experiments for illustration of general principles. ALFRED S. ROE, _Prin. of High School, Worcester, Mass._: I am very much pleased with it. I think it the most practical book for actual work that I have seen. FRANK M. GILLEY, _Science Teacher, High School, Chelsea, Mass._: I have examined the proof-sheets in connection with my class work, and after comparison with a large number of text-books, feel convinced that it is superior to any yet published. G. S. FELLOWS, _Teacher of Chemistry, High School, Washington, D.C._: The author's method seems to us the ideal one. Not only are the theoretical parts rendered clear by experiments performed by the student himself, but there is a happy blending of theoretical and applied chemistry as commendable as it is unusual. J. I. D. HINES, _Prof. of Chemistry, Cumberland University, Lebanon, Tenn._: I am very much pleased with it, and think it will give the student an admirable introduction to the science of chemistry. HORACE PHILLIPS, _Prin. of High School, Elkhart, Ind._: My class has now used it three months. It proves the most satisfactory text-book in this branch that I have ever used. The cost of apparatus and material is very small.