INTRODUCTION. 



At the present time an acquaintance with the archi- 

 tecture of the nervous system is sought, not only by those 

 who expect to pursue the practice of medicine, and who, 

 therefore, need this knowledge for clinical work, but also 

 by anatomists, physiologists, zoologists, and those who 

 are interested in the biological problems that arise in the 

 study of psychology and of its application to education. 



The object of this volume on neurological technique 

 is to serve as an introduction and laboratory guide to the 

 study of the architecture of this the most, complicated of 

 the bodily systems. 



Like most books with similar aims, it has grown out 

 of the attempt to meet difficulties that arose in our own 

 laboratory, and the effort to bring together, in a compact 

 form, such data as would make the student independent 

 in the conduct of his introductory work. In the first 

 instance this was done in a set of laboratory outlines, 

 and these, after trial and correction, have been embodied 

 in this book. 



The material falls into three divisions, each of which 

 maybe briefly mentioned. The methods which are here 

 given have stood the test of application in the laboratory. 

 In their presentation special attention has been paid to 

 indicating the quantities of the reagents to be used and 

 the time required for each. There are few occupations 

 in which time can be more easily wasted than in histolo- 

 gical technique. To assist, therefore, the student in the 

 art of economizing his working hours, the reagent and 

 the minimal time during which it should act are printed 



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