NATURAL SCIENCE. 95 



Introduction to Chemical Science. 



By R. P. WILLIAMS, Instructor in Chemistry in the English High 

 School, Boston. 12mo. Cloth. 216 pages. Mailing Price, 90 cents; for 

 introduction, 80 cents; Allowance for old book in exchange, 25 cents. 



TN a word, this is a working chemistry brief but adequate. 

 Attention is invited to a few special features : 



1. This book is characterized by directness of treatment, by the 

 selection, so far as possible, of the most interesting and practical 

 matter, and by the omission of what is unessential. 



2. Great care has been exercised to combine clearness with 

 accuracy of statement, both of theories and of facts, and to make 

 the explanations both lucid and concise. 



3. The three great classes of chemical compounds acids, 

 bases, and salts are given more than usual prominence, and the 

 arrangement and treatment of the subject-matter relating to them 

 is believed to be a feature of special merit. 



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 per- 

 formed 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 call- 

 ing 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 sim- 

 plified 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 experi- 

 mentation well worth their careful consideration. 



Those who try the book find its merits have not been overstated. 



