520 SP-lOZAfi HISTOLOGY. 



from .',-j of aline; their breadth 10 O028-0-03G of aline; that 

 of their aperture, O'OJ <H):', of I lino. They are Composed of ft delicate 



homogcneoii mtmbran* propria :in'l >f a, cylindrical epithelium, which, 



even during eh vlilicat ion, never, like that of tin; intestine, contains fat; 

 their cavity i; filled, diinir/ life, hy a clear, lluid secretion, the SO-called 

 'i'HtcKt.imtl jtn'tH', which, however, becomes rapidly changed after death, or 

 on the addition of water, so that the glandfl appear to be filled with cells, 

 or with a granular mass. 



The vcNM/it of Urunner's ;/l;mds have the same arrangement as tlioso 

 of the Salivary, \\hil.-.t around Lieberkiihn's r.n-it. they follow exactly 

 the typo of those of the stomach. \ fine network of capillaries of 

 O'OOJJ of a line, passes up round tho cwca and, upon the surface of the 

 mucous inenihrane, enters an elegant polygonal reticulation of some- 

 uhat \\idcr (O'Ol of a line) vessels, which coinninnicatcs on one side with 

 the vessels of the villi, on tho other is directly continuous with veins, 

 \\hieh, after coiuninnicat in;; with those of the villij run directly out of 

 the mucous membrane. Hence, in this case also, the veins are con- 

 nected only with tho superficial network round the glandular apertures 

 and with that, in the /'////, but not with that which surrounds the Blinds, 

 SO that, as in tho stomach, the vessels which supply the secretion im- 

 mediately succeed tho arteries, and precede those to which the absor- 

 bent function is more especially assigned (comp. Frci, cited below). 



\Yhenco tho small round cells, with a single nucleus, which are to be 

 met with in the intestinal mucus, proceed, is doubtful. I have not found 

 them in the .;!. md I and 1 can only refer them to tho epithelium, whence 

 I am inclined to suppose that theso colls, which are usually few, arise 

 upon tho surface of tho mucous membrane, like tho mucous corpuscles of 

 the oral cavity. 



In various, particularly intestinal, disorders, in inflammations, typhus, 

 y'T/Y)/</Y/.s-, l.iihm found a white viscid secretion in many Lieberkiilinian 

 glands ((iland. int., p. 84), which, as subsequent observations of the 

 same author (Durmschleimhaut in dor Cholera, p. 63) would indicate, 

 merely an epithelium detached from the walls of the cavity, and 

 which had hecon I into a compact plug. In cholera, accord- 



ing to Bohm, this epithelium, as well as that of tho whole intestine, is 

 thrown oil'. 



ir>f>. rA>.W/<>///c7<\s of the small intestines. Vesicles of a peculiar 

 kind are found scattered, singly or in groups, over the walls of the small 

 intestine, of whose anatomical and physiological import we have, as ; 

 attained no very clear idea and which may therefore, for the present, be 

 most fittingly described under a general denomination. 



The most important of these are Pcyers patches (glandulce ag mix 

 They are rounded, llat toned organs, invariably situated along that sur- 



