A CONTRIBUTION TO THE KNOWLEDGE OF THE 

 OLFACTORY APPARATUS IN DOG, CAT AND MAN.^ 



EFFIE A. READ, Ph.D. 



From the Lahoratory of Histologj/ and Emhryology, Cornell University. 

 With 17 Plates and 1 Figure. 



CONTENTS. 



PAGE 



Introduction and statement of the problem 17 



Historical summary 19 



Gross anatomy of the olfactory nerves 24 



Relation of the olfactory fibers and bundles to the olfactory mucosa .... 24 



Comparative anatomy 26 



Methods for gross dissection 27 



Histological methods 28 



Gross anatomy of the nose 29 



Histological structure of the olfactory epithelium 31 



The olfactory bulb 33 



Distribution of the 5th nerve to the nose 315 



Free terminations of the 5th nerve within the nasal mucosa 36 



Organon vomeronasale 38 



Gross anatomy of the organon vomeronasale 39 



Histology of the organon vomeronasale 41 



Results 41 



Conclusions 42 



Statement of the Problem. 



1. Position, extent and character of the olfactory epithelium in (a) dog; 



(&) cat ; (p) man. 



2. The position and nature of the olfactoi-y cells. 



'This paper was submitted to the Faculty of Cornell University as a thesis 

 for the degree of Doctor of Philosophy, .Tune, 1907. I wish to express my 

 grateful appreciation to Professor S. H. Gage, whose aid and encouragement 

 made this work possible, and also to acknowledge the abundant material put 

 at my disposal by the Departments of Physiology and Anatomy. 



American .Touenal of Anatomy. — Vol. VIII. 



