12 PREFACE. 



room work, for which this manual is written. 

 Laboratory technique, however, is so extensive a* 

 subject that a laboratory text, or the teacher's 

 personal outlines, should be used for this particular 

 work. In conformity with this view, only the funda- 

 mental principles of laboratory technique are out- 

 lined in the text. 



Lastly, the subjects treated have been made funda- 

 mental and brief, that the teacher in charge may 

 supplement the chapters by collateral work as may 

 fit the particular course offered. It is therefore a 

 basis on which the instructor may build and com- 

 plete his ideal elementary course in histology. 



CHARLES HILU 



