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which in the larger glands is continued into the lymph cords, these 
in turn anastomosing with one another. In other instances the follicles 
are arranged in a layer without being continued into lymph cords, as 
is seen in Pryer’s patches, while not infrequently isolated follicles 
occur, the so called solitary follicles. 
The skeleton of the follicles is reticulated tissue. The rest of the 
follicle"is composed of cells. It is therefore evident that a knowledge 
of the structure of the lymph follicle together with the relation of the 
individual follicles to one another will give us the histology and micro- 
scopical anatomy of the lymphatic gland. 
In this paper it is the relation of the blood-vessels to the unit in 
the lymphatic gland, and to the lymphatic gland as a whole which are 
especially considered. 
According to Frey!) the capsule of the lymph gland is supplied 
with blood-vessels. The gland is supplied with vessels from the capsule 
and from the hilus. As a rule, however, more blood-vessels enter the 
gland from the hilus than from the capsule. The vessels (both arteries 
and veins) of the medullary substance ascend to near the bases of the 
follicles where they break up into a number of small branches. One 
(or more) of these small branches enters the base of a follicle and 
breaks up into a capillary plexus which lies at the periphery of the 
follicle. According to him both arteries and veins lie at the periphery 
of the follicle. 
A few years later His?) worked on the subject in question more 
carefully and gave us the description which is accepted by most of the 
authorities today. He states that the arteries enter the hilus of the 
gland and run in the trabecule toward the periphery. In so doing the 
greater number of the branches leave the trabecule to enter the lymph 
cords and lie in the centre of these. One (or more) of the arteries 
enters the base of a follicle and occasionally one artery supplies the 
adjacent sides of two or more follicles. Often a small artery enters 
the gland from the capsule and accompanies the afferent lymph vessel 
for some distance. The lymph sinus, however, is, according to His, 
destitute of blood-vessels. The arteries of both follicles and lymph 
cords give rise to a rich capillary network which extends to the 
periphery where the capillaries unite to form veins, which accompany 
the arteries. 
In studying the lymphatic gland it has appeared to me that the 
1) Frey, Ueber die Lymphdriisen des Menschen etc., 1861, 
2) His, Zeitschr, f, wiss, Zool., Bd. 9, 
