142 LYMPHATIC SYSTEM. 



ing under these arteries, this lymphatic appears on the inside 

 of the brachial artery at i, where it is deep seated, ascending 

 close to that artery, and near the middle of the arm, passes 

 through the two glands k k, after which it appears consider- 

 ably enlarged, and goes under one of the arteriae anastomaticse 

 at /, m y and then ascends to the lymphatic glands in the axilla. 



But these vessels, though filled more successfully in this ex- 

 tremity than in any other that I ever injected, are only a part 

 of the larger lymphatic vessels of the arm, as there are probably 

 some accompanying the ulnar and interosseous arteries, although 

 not here injected : and they should moreover be considered as 

 only trunks of the lymphatics, since it is probable that every 

 (even the smallest) part of this, as well as all other parts of the 

 body, has one of these vessels adapted to absorption (LXV*); that 

 this is the case seems to be proved by the experiments made 

 with the variolous matter, for at what part soever of the arm that 

 matter is inserted, the lymphatic vessels take it up and carry it 

 into the body, as can be traced by its inflaming the conglobate 

 glands through which these vessels pass. 



In Plate III the termination of all these lymphatic vessels 

 is exhibited. Two of the trunks of those of the left arm are 

 seen at d, d, which pass under the clavicle, whose cut end is 

 seen at D, and under the subclavian vein s, where, having 

 joined, they form the large trunk e, which appears just above 

 the left subclavian vein, and joins the extremity of the thoracic 

 duct at its entrance into the angle between that vein and the 

 jugular. That these lymphatics commonly join the thoracic 

 duct, as is here described, I am persuaded from having seen it 

 distinctly in three subjects. But that they may, in some in- 

 stances, open into the subclavian vein before they reach the 

 angle, I think is likewise probable from having observed it in the 

 case above mentioned; in which case, the thoracic duct having 

 split into two trunks, one of these trunks, instead of entering 

 into the angle between the veins, opened into the subclavian 

 itself, about an inch from the angle ; but this circumstance I 

 should consider as only an exception from a general rule. 



(LXV*.) It is now generally admitted that absorption may take place 

 independently of lymphatic vessels ; see Note LXXXII. In those parts 

 into which blood-vessels cannot be traced, lymphatics have not been 

 discovered. 



