s of the tar increases its absorption. See the three preceding
species of this genus.

12. _Crusta lactea._ Milk-crust is a milder disease than tinea, affecting
the face as well as the hairy scalp of very young children. It is not
infectious, nor liable to swell the lymphatics in its vicinity like the
tinea.

M. M. Cover the eruption with cerate made with lapis calaminaris, to be
renewed every day. Mix one grain of emetic tartar with forty grains of
chalk, and divide into eight papers, one to be taken twice a day, or with
magnesia alba, if stools are wanted. The child should be kept cool and much
in the air.

13. _Trichoma._ Plica polonica. A contagious disease, in which the hair is
said to become alive and bleed, forming inextricable knots or plaits of
great length, like the fabled head of Medusa, with intolerable pain, so as
to confine the sufferer on his bed for years.

* * * * *

ORDO I.

_Increased Sensation._

GENUS VI.

_With Fever consequent to the Production of new Vessels or Fluids._

SPECIES.

1. _Febris sensitiva._ Sensitive fever, when unmixed with either irritative
or inirritative fever, may be distinguished from either of them by the less
comparative diminution of muscular strength; or in other words, from its
being attended with less diminution of the sensorial power of irritation.
An example of unmixed sensitive fever may generally be taken from the
pulmonary consumption; in this disease patients are seen to walk about with
ease, and to do all the common offices of life for weeks, and even months,
with a pulse of 120 strokes in a minute; while in other fevers, whether
irritated or inirritated, with a pulse of this frequency, the patient
generally lies upon the bed, and exerts no muscular efforts without
difficulty.

The cause of this curious phenomenon is thus to be understood; in the
sensitive fever a new sensorial power, viz. that of sensation, is
superadded to that of irritation; which in other fevers alone carries on
the increased circulation. Whence the power of irritation is not much more
exhausted than in health; and those muscular motions, which are produced in
consequence of it, as those which are exerted in keeping the body upright
in walking, riding, and in the performance of many customary actions, are
little impaired. For an account of the irritated sensitive fever, see Class
II. 1. 2. 1.; for the inirritated sensitive fever, Class II. 1. 3. 1. I