6 EXPERIMENTAL PHYSIOLOGY. 



of the result; but the latter is not described in detail, this being left 

 for the student to determine for himself. 



While the general plan and arrangement of the book is the work 

 of the authors jointly, each author is responsible for certain chapters 

 as indicated by the initials given in the table of contents. 



The authors wish to express their thanks to Miss Marion E. 

 Armour for the care and patience which she bestowed in the pre- 

 paration of the drawings for the illustrations, many of which are 

 original while others are copied from other texts, acknowledgment 

 for which is given in the legends. 



They wish also to thank Miss Jean Halliday for her assistance 

 in arranging the index and correcting the proof. They are indebted 

 to Dr. J. P. Eisenberger for a final reading of the proof. 



In the present edition considerable additions have been made 

 in order that the manual may cover a wider field of experiments 

 and, so it is hoped, be of greater assistance in other institutions. 

 A section on General Physiology has been added as well as chapters 

 on Electrocardiography and Respiratory experiments. The 

 methods for air and blood gas analysis have been largely rewritten 

 since it is now possible to obtain at reasonable cost apparatus 

 with stopcocks, thus making it unnecessary to use the simpler 

 apparatus described in the first edition. 



We wish to thank Dr. N. B. Taylor for valuable assistance in 

 the preparation of this edition. 



LOIS McPHEDRAN ERASER. 



F. A. HARTMAN. 

 J. J. R. MACLEOD. 

 J. M. D. OLMSTED. 

 The University of Toronto. 



