the eye-balls and eyelids; as
much I suppose as is expended in the motions of our arms, which are
supplied with nerves of about the same diameters. From hence we may
conclude, that the light should be kept from patients in fevers with
debility, to prevent the unnecessary exhaustion of the sensorial power. And
that on the same account their rooms should be kept silent as well as dark;
that they should be at rest in an horizontal posture; and be cooled by a
blast of cool air, or by washing them with cold water, whenever their skins
are warmer than natural.

4. _Strabismus._ Squinting is generally owing to one eye being less perfect
than the other; on which account the patient endeavours to hide the worst
eye in the shadow of the nose, that his vision by the other may not be
confused. Calves, which have an hydatide with insects inclosed in it in the
frontal sinus on one side, turn towards the affected side; because the
vision on that side, by the pressure of the hydatide, becomes less perfect;
and the disease being recent, the animal turns round, expecting to get a
more distinct view of objects.

In the hydrocephalus internus, where both eyes are not become insensible,
the patient squints with only one eye, and views objects with the other, as
in common strabismus. In this case it may be known on which side the
disease exists, and that it does not exist on both sides of the brain; in
such circumstances, as the patients I believe never recover as they are now
treated, might it not be adviseable to perforate the cranium over the
ventricule of the affected side? which might at least give room and
stimulus to the affected part of the brain?

M. M. If the squinting has not been confirmed by long habit, and one eye be
not much worse than the other, a piece of gauze stretched on a circle of
whale-bone, to cover the best eye in such a manner as to reduce the
distinctness of vision of this eye to a similar degree of imperfection with
the other, should be worn some hours every day. Or the better eye should be
totally darkened by a tin cup covered with black silk for some hours daily,
by which means the better eye will be gradually weakened by the want of
use, and the worse eye will be gradually strengthened by using it. Covering
an inflamed eye in children for weeks together, is very liable to produce
squinting, for the same reason.

5. _Amaurosis._ Gutta serena. Is a blindness from the inirritability of the
optic nerve. It is g