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Sir Everard Home on the 
arm, I have upon another occasion given several illus- 
trations. 
Every thing that is valuable in the pursuits of comparative 
anatomy arises from its making us better acquainted with 
the structure of the human body, and the uses of its different 
organs, respecting which we have no other mode of acquiring 
information. What works can we consult for the improve- 
ment of anatomy and physiology, from which knowledge we 
are to derive our rudiments in the treatment of diseases so as 
to relieve the miseries of mankind, than those of the Great 
and all wise Author to whom we owe our being ; and who 
has spread before us the whole animal creation, not only for 
the purposes of affording food and raiment, but also to 
make us better acquainted with the mechanism of our own 
bodies ? 
I am led to make these remarks in this place, since it ap- 
pears to me that the specks met with in the lungs of the hare 
when the velocity of its progressive motion is overstrained, 
gives us great insight into the disease of the lungs called 
tubercles, one of the most prevalent, and, I may say, the 
most destructive to the natives of our climate. 
On Tubercles in the Human Lungs. 
In proof of our ignorance of the origin of tubercles in the 
lungs, it will only be necessary to examine Dr. Baillie’s 
valuable account of this disease, both in his verbal descrip- 
tion, and the representation he has given of the appearances 
that tubercles put on. He had opportunities of referring to 
what the anatomists before him had done on the subject, and, 
as a teacher, the natural, healthy structure of these organs 
