OVINATION OF HUMAN SUB.IKCT. 153 



(lien with ovine lymph in one arm and vaccine in the 

 other : the vesicles were so similar in appearance that 

 had I not marked the arms I should have been unable 

 to distinguish the one vesicle from the other. A few 

 (lays after the desiccation of the vesicles, the children 

 were inoculated with the virus of human small-pox ; 

 but no consecpiences, either local or general, resulted 

 therefrom. In Fosdinovo I operated with the same 

 ichor on a number of children, and also on a cozo near 

 Aulla ; many of the cases I left under the care of M. 

 Magnani, surgeon, of the latter place, who favoured me 

 with the following details : — ' On the 8th and 1 1th ult., 

 December 1806, I visited the four boys that you had 

 inoculated with ovine "^irus, and found that two of 

 them were affected ; one had two fine pustules [?] on 

 each arm, the other only one on the nght arm. The 

 pustules [?] were similar to those of vaccine, and sur- 

 rounded with a red zone ; but a minute examination 

 shewed that their contents were on the eighth day 

 more yellow than in that disease, a condition which 

 they retained up to the period of the formation of the 

 crusts. At my first visit I obtained some ichor fi'om 

 the pustules [?], which was serous but ?iot limpid. 1 

 inoculated two children with this, and on the seventh 

 day the pustules [?] were filled with a Umj^id fluid. 

 From these, three other indinduals were inoculated, 

 and on the eighth day the contents of the pustules [?] 

 were both limpid and crystalline, as in the tine vaccine. 

 On examining the cow, I foioid hut one pustule [?], 

 which was situated on her udder : it zvas distended with 

 a yellow and turbid fluid. I used this on two boys ; the 

 disease produced by it passed 7'egularly through its 



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