848 ANALYSIS OF CONTINENTAL JOURNALS. 
begins to grow, and in a variable period, generally about 
three months, it is difficult to discover the part that has been 
affected. 
Instead of lotions of sublimate, I have sometimes employed, 
with equal success, friction with an ointment composed of 
1 part nitrate of silver to the 100 of lard. 
It is, perhaps, astonishing to find that a disease which is 
so intractable in children is so readily cured in animals. I 
think this diversity is in great part due to the difference in the 
organization of the skin. In the dog, and more particularly 
in the cat, this is thin, fine, and very supple ; it is furnished 
with numerous hairs, which are delicate and not deeply im- 
planted. The human scalp, on the contrary, which is the 
usual seat of Tinea, is thick, and the bulbs of the hairs are 
inserted profoundly in its texture ; so that as the spores of the 
vegetable parasite insinuate themselves to the bottom of the 
hair-follicle, to the internal face of which they form an ad- 
herent layer,* it will be seen that it is all the more difficult 
to attack the parasite, when it is so deeply situated. 
What leads me to believe that this is the cause of the dif- 
ference in gravity of the disease in animals and mankind is, 
that the favus which, in the latter, is sometimes seen on other 
parts of the body than the scalp, is then incomparably less 
refractory to treatment. “ When the favus simultaneously 
occupies the scalp and other regions of the body,” says M. 
Bazin, “ baths alone will free the body from it, and most fre- 
quently it will not be reproduced. ”f 
Consequences for the public hygiene. — Animals, like people, 
are liable to Tinea ; indeed, it appears to be somewhat com- 
mon among them, for since 186 4 — that is, in a period of four 
years — we have collected nine observations ; and if it has not 
been reported more frequently, it is, no doubt, because the 
attention of observers has not been drawn to it. 
The animals in which it has, up to the present time, been 
observed in have been — the cat, in 1847, by M. Jaquetant, 
and by ourselves in 1864; the mouse , by MM. Bazin and 
Pouquet, in 1858, and quite recently by M. Tripier,J physi- 
cian in the Lyons hospitals; and, lastly, the dog , by. us, in 
* Cb. Robin, ‘ Vegetaux Parasites/ p. 442. 
f E. Bazin, * Recherclies sur la Nature et le Traitement des Teignes/ ] 853, 
p. 94. 
X R. Tripier, c Communication a la Societe des Sciences Medicales de 
Lyons/ Seance of the 21st August, 1S67. 
(I omitted to mention, in my introductory remarks to M. Saint- Cyr’s 
memoir that Dr. Tilbury Eox, in his work, ‘ On the Skin Diseases of 
Parasitic Origin/ when speaking of Tinea, mentions the case of two Italians 
in England who kept white mice. One of these was infected with the 
