INOCULATION OF SHEEP FOR SMALL-POX. 
391 
district; itsextension and continuance for two years, from 1820 to 
1822, in the department of Aube and Herault, are, among other 
proofs which 1 could cite here, demonstrative examples that the 
sanitary measures prescribed according to the acts of parliament 
and regulations in force at the present day, particularly those of 
sequestration and folding, insufficient, in a great number of in- 
stances, to arrest or confine the propagation of epizootic sheep-pox. 
12. To sum up, it follows from the facts above detailed, 
1st. That sheep-pox is a disease which has prevailed, and still 
annually breaks out in France, among the flocks of sheep in most 
of the departments. 
2 dly. That nobody, now-a-days, questions the contagion of the 
disease, either through the virus secreted within the pustules, or 
through the volatile emanations emitted in the form of vapour from 
the skin and the lungs, and united with the surrounding atmo- 
sphere. 
3 dly. That it is possible for such contagious emanations to be 
carried by currents of air, especially warm and dry, to a distance 
estimated at from two to three hundred yards and upwards, and 
so to communicate the disease to flocks in good health. 
4 thly. That animate or inanimate bodies, impregnated with this 
contagious miasm, may prove equally conductors of the disease to a 
greater or less distance. 
5thly. That on any one diseased animal the contagion may 
prove operative for at least fifteen or sixteen days, and for three or 
four months in the case of a flock : circumstances which impera- 
tively call for, during such lapse of time, the employment of sani- 
tary measures, such as folding, confinement in pens, &c. & c. 
6thly. That upon certain circumstances connected with locality, 
season, age, breed, condition, in unison with other circumstances 
hitherto inexplicable, depends the fatality of sheep-pox, insomuch 
that, supposing even the pox prove benignant, it ever behoves 
farmers to dread the invasion of their flocks by such a disease. 
Ithly. That in France the average mortality occasioned by na- 
tural sheep-pox, isolated, enzootic, and annual, prevailing in differ- 
ent localities and under different circumstances favourable and 
unfavourable to the conservation of the sick animals, is, at the 
very least, 10 per cent. ; at the very most from 20 to 40 per cent. ; 
the mean averaging 20 per cent. 
8 thly. That to these per centages must be added the infirmities, 
such as loss of sight, lamenesses, consecutive ailments, the whole 
running from 3 to 4 per cent. 
9 thly. That, in the case of epizootic pox, the mortality, estimated 
at a high rate, rises on an average to 27 per cent., and the consecu- 
tive accidents to 5 or 6 per cent. 
