PREFACE. 



IT is the purpose of this work to present all the essential 

 facts relating to the normal histology and the pathological 

 anatomy and histology of man in a systematic and concise 

 way. In subjects so well established as these, originality 

 of data is little to be expected, and the chief object to be 

 aimed at is arrangement and treatment of the subject in a 

 manner convenient and clear to students and practitioners 

 of medicine, for whom this treatise is intended. It is 

 attempted to present the subject up to the most recent dis- 

 coveries and developments, avoiding points unsettled and in 

 doubt. 



The part on normal histology is written entirely by Dr. 

 Nichols, that on pathology entirely by Dr. Yale. Each is 

 fully responsible for the statements in his own part, and for 

 those only. 



J. B. NICHOLS. 

 FKANK P. VALE. 

 WASHINGTON, D. C. 



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