110 THE CELL DOCTRINE. 



rence, in which white blood corpuscles have been 

 noted by Addison,* Waller, f and Cohnheim,J mi- 

 grating from the bloodvessels, and constituting one 

 method of origin of pus. 



Formed Material, or Non- Germinal Matter. As the 

 result of influences, the exact nature of which is not 

 known, though some of them may partake of the 

 character of oxidations, the germinal matter is con- 

 verted into the second constituent of the cell, formed 

 material. This formed material, peripheral, for the 

 most part in its situation, and constituting the cell 

 wall, when present, is without the property of ger- 

 minating, or multiplying itself, or even maintaining 

 itself. Yet it is exceedingly important, and as essen- 

 tial indeed to the functions of the economy, as the 

 germinal matter. It is, in fact, the portion of the 

 cell in which alone function resides, since it is to the 

 formed material of the muscle-cell that we owe the 

 property of contractility, to the formed material of 

 the nervous element that we are indebted for neu- 

 rility, and to the formed matter of the epithelial cell 

 that we owe its protective qualities; while the se- 

 cretion of all glands, whether they subserve ulterior 

 purposes or not, is the formed material of the re- 

 spective gland-cells. Hence, we would not in every 

 instance speak of the formed material as dead, where 

 it is the seat of so many important vital endowments, 



* Addison, Physiological ^Researches. London : 1841. 



f Waller, London, Dublin and Edinburgh Philosophical Maga- 

 zine, vol. xxix, p. 271, 1846. 



J Cohnheim, Ueber Entziindung und Eiterung, Virch. Arch. 

 Bd. xl, p. 48. 



