XIV EDITOES PREFACE. 



In the preparation of an American edition, the Editor has endeavored 

 to note all the more recent contributions to Histology. Following 

 the example of the Translators, he has also incorporated into the text 

 many paragraphs from the author's larger work, and he hopes, that the 

 volume, as it now stands, may be considered as a fair exponent of the 

 actual state of the science. A recent kind communication from the 

 author, enables the Editor to state, that he, at least, has not changed 

 his views on any material points. All slight deviations from the opinions 

 expressed by Prof. Kolliker in the original edition of this work, as well 

 as his later researches, the Editor has been careful to notice. In making 

 these additions he has endeavored not to lose si^ht of the original in- 

 tention of the author, which he ventures to believe he has furthered 

 by the addition of short pathological notes, wherever the nature of the 

 text seemed to call for them. For convenience of reference, an index 

 has also been added, which was wanting in the German, as well as in 

 the English edition. 



By a comparison with the original, the Editor has further been able 

 to correct many errors with regard to the measurements. The signs 

 ('" for a line, " for an inch) in which these latter were expressed by 

 the author, had been retained by the Translators. As they are not at 

 all employed in this country, it was thought more advisable to substi- 

 tute for them, in every instance, the words they denote. 



The wood-cuts are those used in the original German edition, the 

 publishers having spared neither trouble nor expense to render the 

 present volume as complete as possible. 



The Editor's additions are enclosed in brackets, and mostly marked 

 with his initials. 



Philadelphia, July, 1854. 



