4 LABORATORY STUDIES IN ZOOUXIY 



4. Use as short a guide line as possible. Labeling on each side 

 of a drawing is permissible, when necessary. 



5. It is always desirable to print labels. As an aid for those 

 who have not yet learned to print the accompanying sample of 

 lettering is included. 



Plates. — While the value of original drawings is recognized, 

 it has become apparent that more than a minimum expenditure 

 of time consumed in this way is utilized at the expense of a care- 

 ful study of laboratory materials. With this in mind there has 

 been prepared a series of plates with diagrams to be labeled or 

 completed and labeled. What is lost in drawing is more than 

 compensated by additional time for original study and for an 

 individual demonstration-quiz. Before the close of every labora- 

 tory period each student should demonstrate to the instructor 

 the results of his study and respond to questions. The plates 

 when labeled may be used as a means of recording information 

 for later use. 



