﻿358 The Philippine Journal of Science 



developed in some directions, and may even find some applica- 

 tions in fields other than those of biology. I shall gladly wel- 

 come any suggestions as to the improvement of the technique 

 as described here or of its application to other fields of research. 

 I take pleasure in acknowledging the cooperation of my 

 former students, Dr. A, W. Sellards, Dr. Montrose Burrows, 

 and Dr. Frederick Hecker, in developing this technique. I am 

 also under obligations to Professor E. F. Stimpson, of the physics 

 department of the University of Kansas, and Mr. C. W. White, 

 instrument maker of the University of Kansas, for assistance 

 in working out the mechanical details of the pipette holder. 



