36 SERIAL SECTIONING. 



When the sections are to be designated by number, they should 

 be numbered in the order in which they are placed on the slide. 

 Serial sectioning is very important in any thorough investigation, 

 since it places before the observer all of the object to be studied, 

 in condition for careful searching, enabling one to trace the course 

 of any part in every direction through the object. Serial section- 

 ing certainly saves much time and prevents many misconceptions 

 that might otherwise arise from the examination of a single prepara- 

 tion. 



