NATURAL 
veral instances, I found one solid 
lump of wax, after the destruction 
of the animal substance: and it ap- 
pears to me sufficiently clear, that 
the glands which were filled in this 
manner, were formed internally of 
one cavity, and were not, as is 
common! ly the case, composed of 
many minute cclls. f£ have also 
filled the glands of this struéture, 
in the mesentery of an horse, with 
quicksilver: I have then dried 
them, cutopen the bags, and intro- 
duced a bristle into them through 
the vas infersis. And in the human 
mesentery, after having injected 
the artery, I have filled a hag re- 
sembling a gland with quicksilver ; 
which being opened, a mixture of 
injection and quicksilver was found 
in its cavity. 
That the lymphatic glands in 
most animals are cellular, may not, 
perhaps, be hereafter doubted : 
that they are sometimes mere bags, 
analogy and actual observation in- 
duce me to believe. It might be 
said, that in those instances which 
I have related, the cells were burst, 
or that the g finds were diseased : 
to which I can only reply, that there 
Was NO appearance to lead me ta 
such a conclusion. 
If, then, the lymphatic glands 
are either cellular, cr receptacles 
resembling bags for the absorbed 
fluids, we are naturally led to in- 
quire, what advantages arise from 
this temporary effusion of the con- 
tents of the absorbents. That there 
is a consider ibie quantity of fluids 
poured forth from the arteries of 
the whale, to imix with the absorb- 
éd chyle, is very evident; ner 
can it be doubted that the same 
thing happens in other animals ; for 
the cells of the lymphatic 2 slandé are 
easily inflated, and injecied from 
che arteries, 
HISTORY. 
The ready communication of these 
bags with the veins of the whale, 
induced me to examine whether 
I should ascertain any thing si- 
milar in other animals. Air im- 
pelied by the lymphatic glands, - 
however, seldom gets into veins: 
sometimes indeed veins are inje@ted 
from these glands; but when this 
has occurred to me,-I have observed 
an absorbent arising from the 
gland, and terminating in the ad- 
jacent vein. 
These remarks,:perhaps, may not 
be very important; such, however 
is the nature of the subject, that 
all the knowledge we have hitherto 
obtained of the absorbing vessels 
has been acquired by fragments, 
and all our future acquisitions 
must be made in the same man. 
ner: I have wished, therefore, 
by offering these Sb eivatione to 
contribute my mite to the gene- 
ral stock of our knowledge of this 
subject. 
[383 
An Actount of the late Discavery of 
Native Gild in Ireland. In e 
Litter from Fabn Lijyd, Esq. ta 
Sir Joseph Banks, Bart. From 
the same. 
Cronbane Lodge, near Rathdrum, 
the 4th November, 1796. 
DEAR SIR, 
THE late very important mine. 
ralogical discovery in Ireland, and 
a desire L had jong entertained 
of visiting the celebrated copper 
mine at this place, together with 
the opportun.ty that presenied it. 
sel’, of tnaking my tour in com- 
pany wih Sur friend Mr. Mills, 
who is cne of the propri tors, as 
sole director of ‘the’ mine, 
detertnined me to seize this mo. 
ment 
