xxii EXPLANATION OF BOOK NUMBERING 



If the teacher desires to add books to this list, the next 

 higher number may be used, in the proper classification, and 

 references made at the proper places in the text. Thus the 

 book may be adapted to any locality, and may be used to 

 guide the thoughts of the pupils in any desired direction. 



NUMBERING FOR REFERENCE BOOKS 



1001. Elements of Astronomy. ' Young. Ginn. 

 *1002. Introduction to Astronomy. Moulton. Macmillan. 



1003. Elements of Astronomy. Newcomb. A. B. Co. 

 . 1004. Lessons in Astronomy. Young. Ginn. 



1005. 



1006. 



1007. 



1008. 



1009. 



1010. 



1101. Exercises in Meteorology. Ward. Macmillan. 



1102. Elementary Meteorology. Davis. Ginn. 

 *1103. Elementary Meteorology. Waldo. A. B. Co. 



1104. 

 1105. 

 1106. 

 1107. 

 1108. 

 1109. 

 1110. 



1201. Rocks and Minerals. Fairbanks. Educ. Pub. Co. 



1202. Rocks Weathering and Soils. Merrill. Macmillan. 



1203. The Earth and Its Story. Heilprin. Silver, Burdett. 



1204. Story of Our Continent. Shaler. Gmn. 

 *1205. Elements of Geology. Norton. Ginn. 



1206. Elementary Geology. Tarr. Macmillan. 



1207. Outlines of the Earth's History. Shaler. Appleton. 



1208. Common Rocks and Minerals. Crosby. Heath. 



1209. Textbook of Geology. Brigham. Appleton. 



1210. Compend of Geology. Le Conte. A. B. Co. 



