EDITOR'S PREFACE. 



THE Editor trusts that the present Edition of this Work will be 

 found to embody the principal results of the Physiological investigations 

 that have been undertaken during the last four or five years. 



Both normal and pathological Histology and Histo-chemistry have 

 lately undergone extraordinary development, which has been accom- 

 plished not only by improvements in the construction of the microscope, 

 but by the introduction of new means of investigation, as by Strieker's 

 warmed stage, the application of various agents to harden and stain^he 

 tissues, and of new methods of obtaining sections, as by the freezing 

 microtome of Rutherford, by imbedding in paraffin, wax, gum, and pith. 

 A reference to the great works of Strieker and Frey on the microscopic 

 anatomy of the tissues; to those of v. Gorup-Besanez, and Kiihne, on 

 physiological chemistry, and to that of Rindfleisch on pathology, will 

 show at once that it is impossible, even in a work of this magnitude, to 

 give more than an outline of the more important results of recent 

 research. ' In the additions that have been made, the Editor has en- 

 deavored to keep in view the practical character of the work as origi- 

 nally intended by the Author; and he has preserved, with such altera- 

 tion as appeared to be requisite, those sections that especially bear on 

 the relations between physiology and pathology. In future editions, 

 which will be superintended by other hands, the extension of physio- 

 logical knowledge will probably render necessary a subdivision of the 

 work into two or more volumes, one of which will deal with minute 

 anatomy, another with pure physiology, and perhaps a third with the 

 relations of physiology to pathology. 



In the Section on the Blood the results obtained by Brozeit and Stein- 

 berg on its quantity; of Gamgee on its specific gravity; of Jacobson, 

 Bernhardt, Albert, Strieker, Koruer, and Heidenhain on its tempera- 



