PREFACE. 



THE present work was written primarily to meet the wants of 

 the students attending the course of instruction in "Practical 

 Histology " in The Owens College, but it is hoped that it will 

 be found useful also to students of medicine and science in other 

 colleges and universities. 



The Exercises printed in small type are intended for Senior 

 Students, and for those attending the course of " Advanced 

 Histology " given in The Owens College. 



Although a drawing accompanies almost every exercise, still 

 this is not intended to relieve the student from what is a most 

 important part of the training in Practical Histology, viz., that 

 the student should make sketches of his preparations. It serves 

 very little useful purpose to give students sections ready pre- 

 pared, and ask them merely to mount them. Hence, consider- 

 able stress has been laid on methods, as a knowledge of these is, 

 after all, one of the most important parts of a practical training 

 in Histology. Many methods have been tried and found wanting, 

 and accordingly those only are introduced which the author, after 

 experiment, has found to be reliable. 



The author is indebted to the various Manuals of Histology 

 published in this country, and also to those of Friedlander and 

 Eberth, Stohr, Fol, Kolliker, Martinotti, Francotte, Bolles Lee 

 and Henneguy, Orth, and Edinger, as well as the various Micro- 

 scopical Journals, British and Foreign. 



Most of the illustrations have been drawn from microscopical 

 preparations made in the class of Practical Histology, but a few 



