128 



SPECIAL HISTOLOGY. 



plexus lying immediately under the surface covered by the epidermis, 

 and which is composed of larger vessels (of 0-01-0-005 of a line) with 



Fis. 52. 



wide, and of capillaries (of 0-003-0'005 of a line) with narrow meshes ; and 



secondly, of very many separate 

 ^'"- ^3- loops of the finest vessels (0-003 



'Q^^^i^^^^^^W^i -0-004 of a line) which are given 



^^#^!^?K*'S'>- -^il^^ii- ' off to the vapillce. With cer- 



-^J 



^'^SB^ 



either in the axis of the pcrpilla 

 or near the surface, almost as 

 far as its apex. 



The larger trunks of the li/m- 

 pJiatic vessels are very easily recognizable in the subcutaneous cellular 

 tissue, and are very numerous. In the corium itself different anatomists, 

 Hasse, Lauth, Fohmann, &c., have demonstrated the lymphatics by in- 

 jecting them with quicksilver. All agree in this, that they form an ex- 

 cessively close network of fine vessels in its outermost part, — according 

 to Krause (1. c, p. Ill) of A-t,© of ^ line in diameter; the meshes of 

 which become wider internally, and finally open by single trunks into 

 the vessels of the subcutaneous cellular tissue. However, it is not by 

 any means known, whether the vessels composing these plexuses are 

 really the true commencement of the cutaneous lymphatics. 



Fro. 52. — Vessels of the fat-cells. Ji. Vessels of a small fatlobule ; o, artery ; 6, vein. 

 B. Three fat-cells with their capillaries more magnified ; after Todd and Bowman. Magni- 

 fied 100 diameters. 



Fig. 53. — Vessels oi x\\.e papilla of one entire and two half ridges of the cutis; after Berres. 



