ERYTHEMA, 227 
the application upon the diseased part of vaseline simple, or mixed with 
an antiseptic substance (cresyl, carbolic or boric acid). I£ there is pain, 
cocaine preparations should be used. 
To stimulate the sloughing of the stickfast, vesicating preparations 
(simple blister, mercurial or bi-iodide of mercury ointment) are often 
used. These agents stimulate the progress of the inflammation, and 
noticeably relieve the pain when it is great. The sloughing completed, 
cicatrization of the wound follows soon afterwards. At times a certain 
sensitiveness remains in the region where it took place; this gradually 
diminishes, and its disappearance can be hastened by a slight blister.” 
On the superior border of the neck, on the surface of the implantation 
of the hair of the mane, there appears sometimes, after an eruption of 
acne, a certain number of little necrotic spots on the superficial layer of 
the skin. These have their seat principally in the bottom of the cutane- 
ous folds that are found in some horses at the boundaries of the neck and 
the withers. They are very painful during the time required for their 
elimination (Bouley and Nocard). 
These miliary necrotic spots of the neck are generally found in animals 
that are badly kept. Their skin is generally covered with a greasy sub- 
stance, irritating, and formed of epidermic detritus, dust and fluid exuda- 
tions. A thorough washing with soap and tepid water is first to be pre- 
scribed ; this should be followed by applications of vaseline, mercurial 
ointment or a vesicating friction of mercurial blister, in order to stimulate 
the sloughing of the necrosed skin. After five or six days this should be 
assisted by frequently repeated warm fomentations, and afterwards by 
simple or iodurated glycerine. In the generality of cases, a cure is obtained 
by simple cleansing of the skin. 
II. 
ERYTHEMA. 
It is of rare occurrence in large animals, where it is seen only on hair- 
less surfaces, but is quite common in animals whose skin is free from 
pigment (sheep, pigs, cats and dogs). It may be seen on any part of the 
body, and is characterized by a congestive redness which temporarily 
disappears under pressure, and by a rather strong itching. The region 
is soon hot and tumefied, and cutaneous sores and suppurations may follow. 
When erythema is produced by mechanical causes (pressure, friction, 
clipping), or by chemical (irritating therapeutic applications), at is cir- 
cumscribed ; on the contrary, it is ordinarily diffused when it is due to 
