(6 inches by J of an inch) contains about thirty cubic 

 centimeters. Where only a few centimeters of a solution 

 are to be used the liquid can be measured easily in fine 

 burettes, and burettes of varying size should be at the 

 disposal of each pupil. 



It is desirable that General Science be used in connec- 

 tion with the Laboratory Manual, since the latter is not 

 comprehensive enough to be used alone. 



I take this opportunity to acknowledge my indebtedness 

 to the following teachers of the science department : Misses 

 Norment, Price, and Waldie, who have aided me greatly in 

 the General Science and the Manual. 



BERTHA M. CLARK. 

 WILLIAM PENN HIGH SCHOOL. 



