rather owing to irritative association, or
reverse sympathy, between the lungs and the liver. As occurs in sheep,
which are liable to a perpetual dry cough, when the fleuk-worm is preying
on the substance of their livers. See Class II. 1. 1. 5.

M. M. From half a grain to a grain of opium twice a day. A drachm of
mercurial ointment rubbed on the region of the liver every night for eight
or ten times.

9. _Tussis arthritica._ Gout-cough. I have seen a cough, which twice
recurred at a few years distance in the same person, during his fits of the
gout, with such pertinacity and violence as to resist venesection, opiates,
bark, blisters, mucilages, and all the usual methods employed in coughs. It
was for a time supposed to be the hooping-cough, from the violence of the
action of coughing; it continued two or three weeks, the patient never
being able to sleep more than a few minutes at once during the whole time,
and being propped up in bed with pillows night and day.

As no fever attended this violent cough, and but little expectoration, and
that of a thin and frothy kind, I suspected the membrane of the lungs to be
rather torpid than inflamed, and that the saline part of the mucus not
being absorbed stimulated them into perpetual exertion. And lastly, that
though the lungs are not sensible to cold and heat, and probably therefore
less mobile; yet, as they are nevertheless liable to consent with the
torpor of cold feet, as described in Species 6 of this Genus, I suspected
this torpor of the lungs to succeed the gout in the feet, or to act a
vicarious part for them.

10. _Vertigo rotatoria._ In the vertigo from circumgyration the irritative
motions of vision are increased; which is evinced from the pleasure that
children receive on being rocked in a cradle, or by swinging on a rope. For
whenever sensation arises from the production of irritative motion with
less energy than natural, it is of the disagreeable kind, as from cold or
hunger; but when it arises from their production with greater energy than
natural, if it be confined within certain limits, it is of the pleasurable
kind, as by warmth or wine. With these increased irritative motions of
vision, I suppose those of the stomach are performed with greater energy by
direct sympathy; but when the rotatory motions, which produce this
agreeable vertigo, are continued too long, or are too violent, sickness of
the stomach follows; which is owing to the decreased action of t