OBSERVATIONS ON PORRIGO OR TINEA. 
397 
amining the spot on the rabbit’s head ten days after, I found 
considerable irritation present, scalp somewhat raised, and 
surrounding hair becoming loose. Four days subsequently 
five distinctly marked achores or pustules had appeared 
within the circumference of a shilling piece ; these achores 
were of a light yellow colour, with some slight surrounding 
inflammation, and with evident depressions in their centres. 
In fact, their resemblance to the fam which I had seen in 
the human subject was unmistakeable and complete ; and 
the subsequent superincumbent crusts, which appeared in 
this rabbit, only tended to render the analogy more decidedly 
unquestionable. At first the crusts were comparatively 
isolated, but in a few days they coalesced into one large, 
semi-transparent, deep yellow, irregularly shaped scar or 
crust. 
Second experiment .—I proceeded in exactly the same way 
with a two months’ old pig. Contagious matter from same 
source was used, but no symptoms of either form of tinea, or 
any other bad effects, followed the application. 
Third experiment .—The subject of this experiment was an 
aged grey rabbit, and precisely the same course -was adopted 
as with the first rabbit. After the lapse of three weeks I 
examined this rabbit, and found a circular spot presenting all 
the well-known symptoms of T. scutulata or ringworm; the 
overlying crust was dark grey (slightly tinged with yellow) 
in colour; was pretty deep ; was irregularly rough on the 
surface; softer and much more easily reduced to a powder 
than that of the first rabbit experimented on. 
Fourth experiment. —This, the most interesting of the 
whole series, was performed on a six weeks’ old kitten. As 
in the other cases, a spot was bared on the head, well 
moistened, and rubbed with contagious dust from the crusts 
of common ringworm on a half-year old calf. After the ex¬ 
piry of eight days a patch of the skin on this spot, about the 
size of a sixpenny piece, became slightly elevated and 
irritable-looking. On examining this diseased spot with a 
pretty strong object-glass, I perceived that the greater part 
of the hair or fur had lost its normal appearance, and become 
ragged and broken ; and there appeared to be some slight 
exudation of a glairy-looking matter over the whole spot, 
which exudation seemed to come from the hair follicles ; but 
as yet, however, there appeared no signs of any achorial 
eruption. This was on the twelfth day. On the sixteenth 
day three flattish, pustular-looking bodies were discovered; 
they were of a bright yellow colour, and were perceptibly 
depressed in their centres. Three weeks and two days after 
