THE NATIONAL SERIES OF STANDARD SCHOOL-BOOKS. 



DR. STEELE'S ONE-TERM SERIES, 

 IN ALL THE SCIENCES. 



Steele's i4-Weeks Course in Chemistry. 

 Steele's 14-Weeks Course in Astronomy. 

 Steele's i4-Weeks Course in Physics. 

 Steele's i4-Weeks Course in Geology. 

 Steele's i4~Weeks Course in Physiology. 

 Steele's i4-Weeks Course in Zoology. 

 Steele's i4-Weeks Course in Botany. 



Our text-books in these studies are, a? a general thing, dull and uninteresting. 

 They contain from 400 to 600 pages of dry facts and unconnected details. They abound 

 in that which the student cannot learn, much less remember. The pupil commence* 

 the study, is confused by the tine print and coarse print, and neither knowing exactly 

 what to learn nor what to hasten over, is crowded through the single term generally 

 assigned to each branch, and frequently comes to the close without a definite and exact 

 idea of a single sclent itic principle. 



Steele's " Fourteen. Weeks Courses" contain only that which every well-informed per- 

 son should know, while all that which concerns only the professional scientist is omitted. 

 The language is clear, simple, and interesting, and the illustrations bring the subject 

 within the range of home life and daily experience. They give such of the general 

 principles and the prominent facts as a pupil can make familiar as household words 

 within a single term. The type is large and open ; there is no fine print to annoy ; 

 the cuts are copies of genuine experiments or natural/phenomena, and are of fine 

 execution. 



In fine, by a system of condensation peculiarly his own, the author reduces each 

 branch to the limits of a single term of study, while sacrificing nothing that is essential, 

 and nothing that is usually retained from the study of the larger manuals in common 

 use. Thus the student has rare opportunity to economize his time, or rather to employ 

 that which he has to the best advantage. 



A notable feature is the author's charming "style," fortified by an enthusiasm over 

 his subject in which the student will not fail to partake. Believing that Natural 

 Science is full of fascination, he has moulded it into a form that attracts the attention 

 and kindles the enthusiasm of the pupil. 



The recent editions contain the author's " Practical Questions " on a plan never 

 before attempted in scientific text-books. 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. 



Steele's Key to all His Works. 



This work is mainly composed of answers to the Practical Questions, and solutions of the 

 problems, in the author's celebrated " Fourteen-Weeks Courses " in the several sciences, 

 with many hints to teachers, minor tables, &c. Should be on every teacher's desk. 



Prof. J. Dorman Steele is an indefatigable student, as well as author, and his books 

 have reached a fabulous circulation. It is safe to say of his books that they have 

 accomplished more tangible and better results in the class-room than any other ever 

 offered to American schools, and have been translated into more languages for foreign 

 schools. They are even produced in raised type for the blind. 



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