PREFACE. 



The material which is given in these outlines is 

 intended for children in the grades as numbered. 



The selection of the subject matter is based 

 upon the author's own experience with children from 

 those grades and is not too difficult. It must be re- 

 membered that a title of a section in a science book 

 does not indicate the method of presentation, thus the 

 same title might be found in a book intended for the 

 lower grades as in a book for college students, but the 

 treatment of trie subject matter would be entirely dif- 

 ferent. The best results are obtained by presenting a 

 subject in a manner which brings it just within the 

 capability of the pupils ; working them up to their 

 highest efficiency, but stopping short of their limita- 

 tions. 



The needs of the child are heat, air, water, food, 

 and the conveniences and comforts of civilization. For 

 that reason the subject matter has been divided into 

 ten general sections, while the outline of the complete 

 course has been divided into work suitable for the 

 fifth, sixth, seventh and eighth grades. This outline is 

 offered as an aid to those who wish to develop their 

 own courses. Four books, one for each of the grades 

 mentioned, and based upon these outlines, are in the 

 process of preparation by the same author. 



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