156 SiMAl.I.-l'OX IN SHKKP. 



A third heifer was several times inoculated in dif- 

 ferent ways, and on ^•a^ous parts of the body, all of 

 which fiiiled. And besides these cases of our own, Mr. 

 Ceely has attempted, but in vain, to communicate the 

 disease to the ox tribe. Hence our experience agrees 

 with that of Hurtrel D'Arbo\'al, who maintains that 

 ovine variola cannot be transmitted to the cow by 

 inoculation. 



As we have given in full the observations of Sacco, 

 we will insert those of D'Arboval on this subject, who 

 thus concludes his article on Clavelizat'ion : — " My task 

 w^ould be completed, were it not necessary to add 

 a few words on the inoculation of man and different 

 animals with the virus of sheep-pox. The attempt has 

 been made to give security against attacks of the small- 

 pox, by substituting ovination for vaccination ; and for 

 this purpose children of various ages have been sub- 

 jected to the operation. The inflammation which 

 has come on in the punctures has declined in a few 

 days, without being attended with any specific effects. 



" I^Iany children have been ovinated several times 

 in succession, but it has invariably failed. These 

 same children have afterwards been vaccinated; and 

 at the usual time the vaccine disease has been de- 

 veloped, and has passed regularly through its course ; 

 while simultaneously with these experiments, sheep 

 have been inoculated with the same virus, and the small- 

 pox has been produced. 



" These facts prove, that ovination cannot supersede 

 vaccination; hence, also, we cannot admit that the 

 small-pox of man and of sheep, and the vaccine disease 

 of the cow, are truly identical. 



'' Efforts to communicate variola ovina by inocula- 



