Meyer, Data of Modatt Neurology. 125 



plate of the atlas of Golgi, published by Fischer in Jena, in 

 1894. Fifteen years later Ramon y Cajal published a remarka- 

 bly simple sketch of the architecture of the same region, and 

 since then v. Gehuchten and Martin\ Pedro Ramon^, Kolliker^ 

 Retzius^ Calleja^, and Conil", have essentially corroborated it ; 

 it has passed into almost all of the later text books. It estab- 

 lishes only the following connections : 



I. The olfactory nerve fibers terminate blindly within the 

 olfactory glomeruli. There they come into contact with 2. 

 the dendrites of the large "mitral cells" whose fiber processes 

 help to constitute the olfactory tract. The tcrmmation in the 

 gloincnili of fibers from the olfactory tract is strongly denied by all 

 these uniters, and the whole arrangement is commonly used as a 

 paradigm of the connection of peripheral and central afferent 

 neurones, and also as absolute evidence for the ' law of dynam- 

 ic polarization,' according to which the dendrites receive the 

 nerve impulses and they pass through them into the nerve 

 fibers. Monti reestablishes completely the older observations 

 of Golgi (especially the presence of recurrent fibers to the 

 glomeruli) and demonstrates a certain superficiality of the in- 

 vestigators mentioned. He points out that their inaccurate de- 

 scriptions do not furnish an unassailable basis both for the 

 theory of the conductive function of the dendrites and even for 

 the mere contact connection between nerve elements since the 

 network in the glomeruli is too complex and recurrent collater- 

 als are undeniably present. 



'Van Gehuchten et Martin : Le bulbe olfactif chez quelques mammift^res. 

 La Cellule, T. VII, fasc. II. 



^ Pedro Ramon ; Estructure de los bulbos olfactorios de las avis; Gaceta 

 sanit. de Barcelona; Julio, 1890; and 



El encephalo de los reptiles; III, Bulbo olfactorio, Septembre, 189I. 



^ Kolliker : Ueber den feineren Bau des Bulbus olfactorius; Wiirzburger 

 physikalisch.-Med. Gesellschaft; Dec. 189I. 



* Retzius : Die Endigungungsweise der Riechnerven. Biologische Unter- 

 suchungen, Neue Folge, III, 3, 1892. 



^ Calleja : La region olfactoria del cerebro ; Tesi di Madrid, 1894. 



^Conil : M^moires de la Soci6t6 de Biologic, 1892, p. 179. 



