550 INOCULATION WITH THE MATTER OF TYPHUS. 
Dupuy have contended that there are other benefits connected with 
inoculation with the matter of typhus. 
1. That the employment of inoculation gives the power of trans- 
mitting a mild form of disease to a great many animals at the same 
time. 
2. That even in the supposition of the occasional transmission 
of severe typhus, it gives the opportunity of attacking it at its very 
commencement. 
3. That it enables us to get rid of typhus at once among the 
cattle of a certain locality. 
4. That it relieves the farmer from many of the inconvenient 
and oppressive consequences of the sanitory laws. 
But are these advantages incontestable 1 It is presuming some- 
what too far to say that the inoculated disease will always be mild, 
because there are many proofs to the contrary. Even in the ex- 
perience of these very gentlemen, three cows died out of seven 
that were inoculated ; and can they deny that this universal ino- 
culation, for which they contend, must multiply the foci of contagion, 
and multiply also the cases of disease. If then, on the one hand, 
it has not yet been proved that inoculation will produce in the 
greater number of animals a mild disease, — if, on the other hand, it 
spreads the contagion without materially lessening the comparative 
mortality, would the authorities be justified in permitting this 
hazardous experiment] Would they suffer a measure to be em- 
ployed, the good results of which have not been sanctioned by 
experience ] Would they not prefer to put into practice other and 
simpler measures, such as quarantine — separation and the destruc- 
tion of the infected to a certain extent, the manifest good effect of 
which would justify their employment ] 
However, this may be, and although we cannot yet positively 
admit that inoculation with the matter of typhus w r ill preserve 
from a future attack of that malady, yet if experience should prove 
that, by inoculating w r ith the virus produced in a mild case of 
typhus a disease of an equally mild character would certainly be 
produced, this practice w r ould offer an immense advantage. We 
might then hope, by inoculating all the sound cattle in a country 
menaced by the contagion, and exposed to the destructive effects of 
the epizootic in its usual form, to save a vast number of animals. 
But the question is, Are we sure that these advantages wmuld be 
obtained 1 Can we at the commencement of a malignant epidemic 
substitute a mild one in its stead ? What is the history of the 
typhoid inoculation as it bears on this point] It has been proved 
that during the commencement and the violence of the epizootic, 
the inoculation by Bergius, CEder, and Detlof in Germany, and 
Camper and Munnicks in Holland, and Yicq. d’Asyr in France, 
