PBEFACE. 



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 been omitted. Most of the illustrations are taken from the 

 second volume of Quain's Anatomy, ninth edition, where their author- 

 ship will be found acknowledged. 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 trans- 

 ferred to it from the author's ' Course of Practical Histology.' 



For conveniently accompanying the work of a class of medical 

 students, the book is divided into forty-two 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 

 be made in a class, but it has been thought advisable not to injure the 

 completeness of the work by omitting mention of them. 



