Preface \ii 



while the professional technician can find most of the special methods 

 required on the job; ///. Special procedures, special in the sense that 

 they are not common to every lab, but are important to many. Dis- 

 cussion is far from complete for many of them, but references are 

 appended. IV. Laboratory aids, general information handy to have in 

 any lab. The list of references includes those occurring in the text 

 and others whose titles may lead an occasional technician to otherwise 

 undiscovered source material. 



A ck now ledgmeii ts 



An invaluable personal satisfaction has been derived by the author 

 from her association ^vith students, no matter Avhat their caliber. Stu- 

 dents force a teacher to develop tolerance and patience, qualities 

 essential in this temperamental profession. Students also are a blessing, 

 because there is no surer way to master a subject than to teach it. 

 One student in particular should receive credit for her encouragement 

 and her prodding toward this book — Miss Marlies Natzler of the Uni- 

 versity of California at Los Angeles. 



Acknowledgnient is due the artist, Marvin Linke, for his quick 

 understanding of the subjects he was asked to illustrate. 



Gratitude is extended to the Zoology Department of the University 

 of California at Los Angeles for the lessons the author learned while 

 a student, a departmental technician, and a lecturer, and to Dr. C. C. 

 Lushbaugh of Los Alamos for guidance in pathology. 



August 1961 Gretchen L. Humason 



