PHYSICAL AND LITEaARY.485 



gain which are placed beyond the £rft 

 and great fyftem of veflels, fufferin^ rid 

 immediate impulfe from the blood itit 

 the arteries^ fomecimes continue long in- 

 creafmg, or at a (land, before they are 

 brought to a termination; till the tu- 

 mors, acquiring greater acrimony, or dit 

 ftending the veflels more, caufe greater 

 irritation, fluxion, and inflammation, 

 with tumor of another kind ; in which 

 cafe it becomes a complicated difeafe. 



A membrane, regarding its ftruaure 

 and appearance, feems altogether to re-- 

 fcmble a tendon, perhaps with this dif- 

 ference only, that the fibres of the one, 

 running parallel to each other, are col- 

 leded into a bundle, ftrong and com" 

 padl; while thofe of the other, difpofed 

 in different directions, or interwoven, are 

 fpread out into a larger furface .; and, 

 from the nature of the part, we form a 

 very different notion of a tumor here 

 from one in a flefliy part ; as that of a 

 bone muft greatly differ from either. 



This membranous tumor may be pro- 

 duced, either by congeftion, as it is caU 



Ud, 



