4: THE LABORATORY 



For temporary use, small vertebrate forms may be kept 

 in a strong solution of common salt. This draws out the 

 blood and, if poured out and renewed occasionally, gives ex- 

 cellent satisfaction. 



For class use it is an excellent plan to have each student 

 keep his specimen in a glass fruit-jar, labeled with his own 

 name. 



Reading List. — The teacher should make a hst of avail- 

 able books on animals for the students' use. Give the author 

 and page of the book where the desired information is to be 

 found. This reading list is very helpful for points which are 

 hard to get from the animal. 



''The Teaching of Biology/' by Lloyd and Bigelow (Long- 

 mans, Green and Co., N. Y., SL50), is very helpful to the 

 teacher. It contains scores of references to biologic subjects. 



