PREFACE 



TO 



THE SECOND EDITION. 



No subject more than Practical Histology requires 

 for its successful pursuit that guidance which oral 

 instruction alone can give. If the beginner attempts 

 to study it without a teacher, he is baffled in learn- 

 ing how to use the microscope, how to manipulate 

 the tissues, and how to apprehend rightly the phe- 

 nomena that come under his observation. Much 

 valuable time is thus lost, and the final result is 

 generally failure and disappointment. 



These Outlines are therefore primarily intended 

 to assist beginners who are working under the 

 guidance of a teacher in a laboratory furnished with 

 the usual appliances, together with a full set of those 

 microscopical specimens that cannot be readily made. 

 They are at the same time, however, designed to assist 

 those who may already have learned the rudiments of 



