154 DR. E. KLEIN. 



On the Lymphatic System and tJie Minute Structure of the 

 Salivary Glands and Pancreas. By E. KleiNj M.D., 

 P.II.S.' With Plates XI and XII. 



The research, of which I propose to give an account in the 

 following, had for its object to investigate, in continuation of 

 my work on the lymphatic system of the skin and mucous mem- 

 brane (see the ' Report of the Medical Officer of the Local 

 Government Board ^ for 1879), the lymphatics of the salivary 

 glands, and the pancreas. At the outset of this investigation I 

 found it necessary to ascertain the exact nature and arrangement 

 of the connective tissue, so intimately connected with the lym- 

 phatics, in the above organs, and at the same time I became 

 convinced that the current descriptions (Henle, Heidenhain, 

 Lavdowsky, Bermann, and others) given of the structure of the 

 salivary glands admit in many respects of alterations and addi- 

 tions. I shall therefore have to record the results of these 

 observations on the anatomy of the salivary glands and pancreas 

 under the following three headings : — (a) the connective 

 tissue ; (b) the lymphatic system ; and (c) observations on 

 the minute structure. 



The organs were obtained of man, ape, dog, rabbit, and 

 guinea-pig ; the glands were cut out as soon as practicable after 

 death, and were hardened in spirit or in chromic acid or in a 

 mixture of both. Sections were then prepared in the usual way, 

 or minute bits were teased out and mounted. This latter 

 process was especially resorted to for the study of the connective 

 tissue, both of the glands in the fresh and hardened state. Por 

 the demonstration of the lymphatics injection by })uncture (see 

 my former Eeport) of a 2 per cent, solution of Briicke^s Berlin 

 blue was practised. I did not use any other injection material, 

 e.g. asphalt in benzole, because I completely succeeded with 

 the Berlin blue, this reagent being at the same time the best for 

 the manipulation and the subsequent preparation of the respective 

 organs. 



A. — The Connective Tissue. 



Henle^ mentions that fine bundles of connective tissue pass 

 from the interlobular parts into the lobules between the alveoli, 

 forming a reticulated framework for these latter. Numerous 

 lymph-corpuscles are here met with. 



* Reprinted from tlie * Reports of the Medical Oflicer of the Local Go- 

 verunieiit Eoiud/ AiipcLidix B, 18S0, 

 ' ' Anatomic d. Meuscheii,' 2 Band, 1, p. 65. 



