the above case for the first 9 or 10 days it did not
exceed 110, and was full and strong.

3. To find out whether any febrile alternations took place, Master L.'s
feet were frequently felt, and they were found at times cold, and at
other times of a dry heat. I have many times seen this disease, but the
patients were too young, or too far advanced, to inform me, whether
they had chillness succeeded by heat at its onset. 4. The disorders to
which the young are more peculiarly liable afford a presumption, that
hydrocephalus internus is an inflammatory disease; and this is
confirmed by the regularity of the period, within which it finishes its
course. And lastly, does it not happen more frequently than is
suspected from external injury?

I have just now been well informed, that Dr. Rush has lately cured five
out of six patients by copious bleedings. I relate here the reasons for
an opinion without pretending to a discovery. Something like this
doctrine may be found in certain modern publications, but it is
delivered in that vague and diffuse style, which I trust your example
will banish from medical literature."

Clifton, near Bristol,
_July 28, 1795_.

To this idea of Dr. Beddoes may be added, that the hydrocele generally
succeeds an injury, and consequent inflammation of the bag, which contains
it. And that other dropsies, which principally attend inebriates, are
consequent to too great action of the mucous membranes by the stimulus of
beer, wine, and spirits. And lastly, that as these cases of hydrocephalus
end so fatally, a new mode of treating them is much to be desired, and
deserves to be seriously attended to.

ADDITION III. ON VERTIGO.

_To be placed after the additional Note at the end of Vol. I. on this
Subject._

Having reperused the ingenious Essay of Dr. Wells on Single Vision, and his
additional observations in the Gentleman's Magazine on the apparent
retrogression of objects in vertigo, I am induced to believe, that this
apparent retrogression of objects is not always owing to the same cause.

When a person revolves with his eyes closed, till he becomes vertiginous,
and then stands still without opening them, he seems for a while to go
forward in the same direction. This hallucination of his ideas cannot be
owing to ocular spectra, because, as Dr. Wells observes, no such can have
been formed; but it must arise from a simi