422 SPECIAL HISTOLOGY. 



account a solution of albumen, or humor vitreus, only should 

 be employed to moisten it. Vertical sections in detached 

 portions of the mucous membrane, are best made with the 

 scissors ; and the edges of folds not unfrequently afford good 

 sectional views. The mucous glands, are found in sections; 

 those of Bowman on teasing out the structure. Chromic acid 

 cannot be recommended for the olfactory nerves : teasing out 

 the membrane is the most suitable mode of proceeding ; as well 

 as the compression of fresh preparations or of preparations 

 moistened with soda or acetic acid; lastly, the examination of 

 mucous membrane macerated in water, in which the nerves 

 are preserved for a long time.] 



Literature. — Todd and Bowman (op. cit., II). [Horn, 

 ' Ueber die Endschlingen des Geruchsnerven/ Mull. 'Archiv/ 

 1850. Dr. Horn professes to have discovered looped termina- 

 tions of the olfactory nerve in the Frog. — Eds.] 



