144 
F. S. MIXINGS 
at least Hamon reports having inoculated monkeys from success¬ 
fully vaccinated dogs, and as having obtained well characterized 
pustules with a prominent pit, the contents of which were re-inoc¬ 
ulated upon dogs with positive results. 
Agnelli reports having observed an exanthema resembling 
that of v. vaccina by camels, in 1850, in Algiers, the lymph of 
which inoculated to man, protected the same from v. humana. 
Masson reports that in East India a variola-like eruption lias been 
known for a long time to prevail by camels. 
Of the wild mammalia, hares are said to be much subjected 
to variola, and especially in North Germany has this assertion 
won a considerable importance, as people have looked upon hares 
as the interposers and vehicles, frequently as the originators of 
v. ovina. According to hunters and foresters, this so-called variola 
of hai 'es frequently assumes a malignant form. Aside from the 
fact that numerous endeavors to transmit ovine to hares have 
regularly been followed by negative results,—wdiile rabbits are 
occasionally susceptible,—I do not in the least doubt, that that 
pathologic process which has been falsely designated as variola of 
hares,is nothing less than that constitutional and probably infectious 
disease described by me, which is characterized by the develop¬ 
ment of noduli and pustula? in and upon the cutis, and which 
bears a resemblance to tuberculosis or syphilis and is designated 
in South Germany and Switzerland as “ venerie ” or “ syphilis of 
the held hares.” 
Similar to the variola of hares is that of fowls, except with 
this difference: that by the latter an infectious exanthema much 
resembling true variola? does in reality come to pass. This ex¬ 
anthema is, however, in its anatomical characteristics, sharply 
distinguished from variola; and, according to its essential char¬ 
acter, is to be distinguished as a contagious epithelioma. I have 
observed and described this very interesting disease as I saw it in 
a henery in Zurich, and have again found exactly the same di¬ 
sease in several old preparations at Miinchen. This disease, char¬ 
acterized by its epithelial actions, presents itself as an epizootic 
pest of the domestic fowls, and probably also by other birds. It is 
chiefly localized upon the head, and produces a contagium of great 
