1885.] : Psychology. 99 
nial injection (the most deadly method), death does not result, 
but the animal acquires an immunity from hydrophobia. (2) If, 
on the other hand, the poison of rabies be cultivated in suc- 
cessive rabbits or guinea-pigs only, its potency is intensified, and 
after a time is so great that a fatal issue invariably follows its 
inoculation. The ‘poison as found in the dog is intermediate in 
strength between that of the two methods of cultivation just 
mentioned. Thus by careful selection of the medium and the 
stage of cultivation, it is possible to accumulate a store of attenu- 
ated virus which can be relied on to communicate a modified 
rabies whose inoculation shall be protective against its severer 
forms, as that of vaccinia is against variola. There is also good 
reason to believe, though the actual experiment is postponed, 
that, as with vaccinia, the modified poison hypodermically en- 
grafted immediately after the bite of a rabid animal, will forestall, 
by the speed of its development, the symptoms due to the bite. 
No experiments have as yet been made on the human subject. 
(Progrès Médical, May, 18834). The experiments which M. 
Pasteur is reported thus far to have made are said to be an un- 
broken success. Fifty-seven dogs have been the subjects of 
investigation. Of these, nineteen were rabid, and by these, thirty- 
eight healthy animals were bitten under uniform conditions. Of 
the thirty-eight, one-half the number had been previously inocu- 
lated or “ vaccinated ” with attenuated virus, the other half had 
not. The latter, without a single exception, died with unequivocal 
signs of rabies, whereas the nineteen others remain as well as ever. 
They will be watched for a year by veterinary surgeons to see 
whether the inoculation holds good permanently or only tempo- 
rarily. If rabies be not spontaneous in its origin, and if the 
experiments of Pasteur all turn out successful, there seems no 
reason why canine madness should not be extirpated from our 
midst.—Lancet, Fuly 12, 1884. 
PSYCHOLOGY. 
CLEVENGER ON THE EvoLuTion oF Minp AnD Bopy oF MAN AND 
Animats.'—We have here a work, scientific and speculative, on 
several of the live questions of the day. The author is an evo- 
lutionist physical and metaphysical. More than this, he is a 
mechanical evolutionist, and endeavors throughout the book to 
prove the origin of structures through use and effort, and their 
loss by disuse. The especial object of the discussion is to dem- 
onstrate the origin of mind and its various departments by the 
action of its material basis. From this ape he does not ex- 
l EEEE Physiology and 1 Pcholgy by S. V. Clevenger, M.D., Chicago, 
Jansen EE & Co., 1885, pp 
