PREFACE. 



THIS BOOK is written with the object of supplying the student with 

 directions for the microscopical examination of the tissues. At the 

 same time it is intended to serve as an Elementary Textbook of 

 Histology, comprising all the essential facts of the science, but omit- 

 ting unimportant details, the discussion of which is only calculated to 

 confuse the learner. For a similar reason references to authorities 

 have also generally been omitted. Most of the illustrations are taken 

 from Quain's Anatomy. Of the remainder, those which have been 

 selected from other authors are duly indicated ; the rest have either 

 been drawn expressly for this work, or have been transferred to it 

 from the author's Course of Practical Histology, 



1 am indebted to Dr. Ferrier for permission to use the illustrations 

 of the structure of the spinal cord and cerebral cortex which have been 

 contributed to the second edition of his book, The Functions of the 

 Brain, by Mr. Bevan-Lewis. 



For conveniently accompanying the work of a class of medical 

 students, the book is divided into forty-five lessons. Each of these 

 may be supposed to occupy a class from one to three hours, according 

 to the extent to which the preparations are made beforehand by the 

 teacher or are prepared during the lesson by the students. A few of 

 the preparations e.g. some of those of the sense-organs cannot well 



