114 Elementary Work in Botany. 



plated cover does not fit air tight, but that is not necessary. 

 To prevent molding the jars may be treated in this way: 

 Fill one jar two-thirds full with water, leaving the stick in; 

 add a teaspoon ful of carbolic acid; put on the cover and 

 shake; pour into the next jar and so on. Use but one cover 

 in treating the jars and dry it when through. It would be 

 well for the school to own a set of jars. 



REFERENCE BOOKS AND BOOKS FOR THE TEACHER. 



The following books should be in the school library, 

 along with others that might well be there: 



" Natural History of Plants," by Kerner and Oliver; 

 " Flowers, Fruits and Leaves," by,Lubbock; "Introduction 

 to Botany," by Volney M. Spalding; " Elements of Botany," 

 by J. Y. Bergen; " Structural and Systematic Botany," by 

 D. H. Campbell; " Laboratory Practice for Beginners in 

 Botany," by Wm. A. Setchell. 



The last four are inexpensive and are worth more to 

 teacher and pupil than all the expensive manuals and text 

 books put together. They are so unlike that all are needed. 

 The first book named is expensive but worth much more 

 than its cost. It has been criticized for defense of what 

 conservative scientists call fanciful theories or hypotheses, 

 but it must be remembered that probably all our theories 

 are but long-lived hypotheses. Grant White is still more 

 "fanciful," yet worth reading by the teacher who needs 

 inspiration. 



