( 30C ) 



iingle fmall Nerve I found to be five at leaft, and each of thofe five 

 as minute as that repi-efented at Jig. 3 7, G A F. But I wondered to 

 fee tliat thcfe fmall Nerves, as foon as they ifllied from the fpinal 

 marrow, were inferted mto the membrane that furrounded it, and 

 became in a manner united to it. But when they again quitted the 

 membrane, they feemed larger, and to be covered with a new mem- 

 brane or coat. But in this place I found the Nen^es, wliich I had 

 cut off near their origin, fo covered with fat, and furrounded with 

 fuch llrong membranes, that I could not feparate them to my mind. 



Thefe obfervations I afterwards repeated in other objedls, for the 

 mod part with the like fuccefs, and in fome of them I faw the ca- 

 vities or orifices of the fmall veflels, compofing the Nerves, fiill more 

 di(lind;ly ; and, upon fhewing tlie fame to a learned friend who 

 called upon me, he declared that he could diftin6lly fee the fame. 



Whoever wdtlies to make fimilar obfervations, mufi: be careful in 

 cutting acrofs fuch minute vefiels, fo to hold his knife and to make 

 the incifion, that it may not be in the leaft obhque. The knife alfo 

 muft be very fharp, and the edge of it as thin as pofiible, otherwife 

 the cavities of the velTels will, in the cutting, be comprelled and 

 clofed up. 





