surface of a membranous cell, into which they all 

 pour their liquor, which is discharged at a small orifice. 

 These vessels are often of a. great length, though 

 they take up little room, being wound over one another, 

 sometimes in a single knot and sometimes in several) 

 enclosed in a common membrane. And hence is the 

 distinction of glands into conglobate and conglomerate. 



A conglobate gland is a little smooth body, wrapt 

 up in a fine double skin, with only an artery and 

 nerve passing in, and a vein and excretory duct going 

 out. 



A conglomerate gland is an irregular assemblage of 

 several simple glands, which are tied together and 

 wrapt under one common membrane. 



13. A muscle is a bundle of fibres joined and fasten* 

 ed together, with their proper veins, arteries, and 

 nerves. It is divided into Jittle cells by transverse 

 fibres, parallel to each one, whereby it may be con- 

 tracted and shortened, or relaxed and lengthened 

 again. Its extreme parts are more closely compacted, 

 which we term tendons ; by these the muscles are con 

 nected with tie neighbouring parts. A muscle generally 

 consists of three parts ; the upper, termed the head, 

 the middle, termed the belly, and the lower part or 

 tail. 



Every muscle is divisible into smaller muscles, and 

 those into other still smaller, and so on beyond all 

 imagination. The last and smallest parts are muscu- 

 lar fibres, but there is no assignable point in any 

 muscle wherein there is not some nerve, and here all 

 the nerves disappear ; (in other parts their extremi- 

 ties expand into membranes.) It is therefore probable 

 that the muscular fibres are only the nervous con- 

 tinued. 



14. The cuticle or scarf-skin, is an extremely thin 

 and transparent membrane, void of sense, and cover, 

 ing the skin all over, sticking last to its surface, to 



