676 
D. E. SALMON. 
the statement so frequently made that all of the alleged cases 
of rabies in man are nothing more than a mere nervous affec¬ 
tion developed as the result of worry and fear—the so-called 
lyssophobia ? The men who make such a statement must 
either be very ignorant of comparative pathology or they must 
be very reckless in their assertions. Let some person who 
holds these views tell us of a single disease which is communi¬ 
cable between so many species and such unrelated animals as 
the horse, the ox, the sheep, the pig, the dog, the rabbit, and 
the guinea pig, and which is not at the same time communica¬ 
ble to man. One of the commonest diseases affecting unre¬ 
lated species of animals is tuberculosis. It is also the common¬ 
est disease of man. Another disease affecting all warm-blooded 
animals is anthrax. It is easily communicable to man. Glan¬ 
ders, a disease of the equine genus, may be communicated to 
dogs, cats and other carnivora, and to guinea pigs, and with 
difficulty to sheep, goats and pigs ; it is not communicable to 
cattle, yet it readily affects man. Actinomycosis affects cattle, 
swine, horses and some other animals, and to this disease man¬ 
kind is also susceptible. Cow-pox affects horses and cattle and 
is easily transmitted to man. Aphthous fever, though more 
particularly a disease of ruminants, affects also horses, dogs, 
cats, pigs and poultry ; it is frequently communicated to man. 
Tetanus affects widely separated kinds of animals and attacks 
mankind. Malignant oedema is a disease of various species of 
animals and also of man. This covers the communicable dis¬ 
eases other than hydrophobia which affect widely separated 
species of animals. The rule in comparative pathology, there¬ 
fore, is that a disease which may be communicated to unrelated 
species of animals may also be communicated to mankind. 
It is easily shown by inoculation experiments, which may 
be repeated at any time, that rabies affects as wide a range of 
subjects in the animal kingdom as do any of these diseases ; it 
is not confined to domesticated creatures, but develops in wild 
animals, birds and monkeys. All analogy, therefore, would lead 
us to conclude that mankind should be susceptible to it. Add 
