77/6 A7(n'<,7:a? .^cn'es of Sfcn?dard Sc?ioot-2)ooks. 



NATURAL SCIENCE. 



'FOURTEEN WEEKS" IN EACH BEAITOH. 



By J. DORMAN STEELE, A. M. 



Steele's 14 Weeks Course in Chemistry 

 Steele's 14 Weeks Course in Astronomy 

 Steele's 14 Weeks Course in Philosophy 

 Steele's 14 Weeks Course in Geology. 

 Steele's 14 Weeks Course in Physiology 



Our Text-Books in these studies arc, as a general thing, dull and uninteresting 

 They contain from 400 to CJO pages of dry facts and uuconncctcd details. They 

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

 commences the study, i^ confused by the line print and coarse print, and neither 

 knowing exactly what to learn nor what to hapten over, is crowded through llics 

 single term generally assigned to each branch, and frequently comes to the clo_'e 

 Without a definite and exact idea of a single scientific principle. 



Steele's Fourteen Weeks Courses contain only that which every weH-in formed 

 person 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 Iffe and daily experience. They ^rive 

 such of the general principles and the prominent facts as a pupil can make famil- 

 iar as household words within a single term. The tj-pe is large and open ; there 

 is no fine print to annoy; the cuti are copies of genuine experiments or naturar 

 phenomena, and arc of fine execution. 



In fine, by a syste.n of condensation peculiarly his own, the author reduces each 

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

 sential, and nothing that is usually retained from the study of the larg1;r 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 liis subject in which the student will not fail to partake. Believin.' that 

 Natural Science is full of fascination, he has moulded it into a form that atlracia 

 ■fhe 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 inteUigent use of the student's knowled-'e of 

 the foregoing principles. ° 



Steele's General Key to his Works- . . . *i 53 



This work is mainly composed of Answers to the Practical Questions and Solu- 

 tions of the Problems in the author's celebrated "Fourteen Weeks Courses " iu 

 the several Bcieuces, wath many hints to teachers, minor Tables, &c. Should ba 

 on every teacher's desk. 



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