al debility; as in some of them in the latter stage of the
disease, an emphysema could often be felt in some parts, which evinced a
considerable progress of gangrene beneath the skin. In the sensitive
inirritated fevers of these animals, I suppose about sixty grains of opium,
with two ounces of extract of oak-bark, every six hours, would supply them
with an efficacious medicine; to which might be added thirty grains of
vitriol of iron, if any tendency to bloody urine should appear, to which
this animal is liable. The method of preventing the infection from
spreading, if it should ever again gain access to this island, would be
immediately to obtain an order from government to prevent any cattle from
being removed, which were found within five miles of the place supposed to
be infected, for a few days; till the certainty of the existence of the
pestilence could be ascertained, by a committee of medical people. As soon
as this was ascertained, all the cattle within five miles of the place
should be immediately slaughtered, and consumed within the circumscribed
district; and their hides put into lime-water before proper inspectors.

14. _Pemphigus_ is a contagious disease attended with bladdery eruptions
appearing on the second or third day, as large as filberts, which, remain
many days, and then effuse a thin ichor. It seems to be either of a mild
kind with sensitive fever only, of which I have seen two instances, or with
irritated, or with inirritated fever, as appears from the observations of
M. Salabert. See Medical Comment, by Dr. Duncan, Decad. II. Vol. VI.

15. _Varicella._ Chicken-pox is accompanied with sensitive fever, pustules
break out after a mild fever like the small-pox, seldom suppurate, and
generally terminate in scales without scars. I once saw a lady, who
miscarryed during this disease, though all her children had it as slightly
as usual. It sometimes leaves scars or marks on the skin. This disease has
been mistaken for the small-pox, and inoculated for it; and then the
small-pox has been supposed to happen twice to the same person. See Trans.
of the College London. It is probable that the pemphigus and urticaria, as
well as this disease, have formerly been diseases of more danger; which the
habit of innumerable generations may have rendered mild, and will in
process of time annihilate. In the same manner as the small-pox, venereal
disease, and rickets, seem to become milder or less in quantity every half