ANALYSIS OF CONTINENTAL JOURNALS. 745 
assured me that, in his country at least, the favus was not 
rare in animals, and that he had occasion to see it more than 
once in rats. He had carefully noted a very remarkable 
observation, and I requested him to transmit these notes to 
me on his return to New York. The following is a sum- 
mary of this observation, which Mr. Draper had also kindly 
sent with some fragments of crusts taken at the time from 
the diseased animals : 
“ In the course of the year 1854, several members of the 
same family, among whom was a young physician, remarked 
that a number of mice caught in a trap were affected with a 
singular disease. On the head and fore limbs were yellowish 
crusts, of a deep shade, generally circular in shape, and 
more or less elevated above the healthy textures. In ad- 
dition, a manifest depression was observed in the centre of 
each of these crusts, as is noticed in Porrigo favosa ; on the 
parts where the crusts had been shed there were ulcers, which 
appeared to have entirely destroyed the skin. These diseased 
creatures were given to a cat, which some time afterwards 
showed above the eye a crust similar to that on the mice. 
Subsequently, two young children of the house who had been 
playing with the cat were successively, at an interval of 
fifteen days, affected with the same disease ; the yellow 
circular crusts were seen on several parts of the body — the 
shoulder, hip, and thigh. The doctor who was called in 
gave it the redoubtable name of Porrigo favosa. Neverthe- 
less, applications of acetate of copper and hyposulphite of 
soda were sufficient to make a complete cure of the little 
patients.” 
The crusts sent with the notes had been taken by Mr. 
Draper from the head of a mouse ; and this gentleman, who 
had gained a knowledge of the use of the microscope at 
M. Robin’s school, wrote to me after examining it, as follows : 
— “ I am under the impression that it is the same favus I 
have examined before.” M. Bazin, in his turn, having exa- 
mined the fragments sent, found the Achorion in all its most 
marked features. The cryptogam had not become altered by 
time. 
This is all the information I have found with regard to the 
tinea of animals, and it will be seen what my personal re- 
searches have added to the subject. These researches go back to 
1864. On the 27th of August in that year, an ironmonger 
in this town presented to the clinic of our school a young 
cat which had on its abdomen, near the umbilicus, two 
scabby patches, regularly circular, of a bright brimstone 
colour, about the size of a 20-centimes piece, the borders of 
