INTRODUCTION 3 



by grants from the Crocker Fund. We also wish to here acknowledge 

 the assistance received in the prosecution of this work through a 

 grant of $250 received during the year 1907-1908 from the Rockefeller 

 Institute for Medical Research. 



It was considered proper to include all the results heretofore 

 attained in this research in a single volume, published through the 

 Columbia University Press. This procedure seemed all the more 

 desirable to us because one of Carmalt's principal purposes in under- 

 taking the salivary research was to furnish a sound morphological 

 basis for the development of neoplasms of this region. We feel, there- 

 fore, that this aspect of his work is fully entitled to participate in the 

 opportunity for publication offered by the Trustees of the University 

 tlirough the Crocker Research Fund. 



The studies contained in the present volume are offered in the hope 

 that they may afford a morphological and developmental basis for 

 the investigation of the epithelial structures directly or indirectly 

 involved in the mammalian salivary apparatus, and perhaps further 

 throw light on the phylogenetic aspect of the epithehal neoplasms of 

 this area. 



It was unavoidable that the individual chapters should, to a greater 

 or lesser extent, represent the viewpoints of their respective authors. 

 While we have endeavored to assimilate the work as far as possible 

 into a consecutive whole, and to provide extensive cross-references 

 between the individual parts of this volume, each main chapter 

 represents, as a matter of fact, an independent piece of work. This 

 necessitates a certain amount of repetition, especially in reference 

 to terminology, which could have been avoided if the book were the 

 work of a single author. 



We desire to express our grateful appreciation of the work of Mr. 

 Petersen, who made the drawings here published, and to thank Dr. A. 

 J. Brown for the great care and skill with which he prepared the 

 photomicrographs. 



Columbia University, 

 February, 1912. 



Geo. S. Huntington 



h. von w. schulte 



