. History and pathology of vaccination. ^ .^^ Pt fr. INOCULATED HORSE POX (JENNKR).Case of Hannah Excell. PUBLISHED ^INQUIRYr 275 Besides adding fresh cases, the whole manuscriptwas carefully revised. With regard to the horsegrease theory, Jenner now felt himself in a positionto speak more positively, for in referring to thepossible transference of infectious matter froni thehorses heel to the cows teat, he substituted the wordswhen this is the case for should this be the case. Several expressions are modified in his description ofCow Pox. In his paper, he had written that the pus-tules were s


. History and pathology of vaccination. ^ .^^ Pt fr. INOCULATED HORSE POX (JENNKR).Case of Hannah Excell. PUBLISHED ^INQUIRYr 275 Besides adding fresh cases, the whole manuscriptwas carefully revised. With regard to the horsegrease theory, Jenner now felt himself in a positionto speak more positively, for in referring to thepossible transference of infectious matter froni thehorses heel to the cows teat, he substituted the wordswhen this is the case for should this be the case. Several expressions are modified in his description ofCow Pox. In his paper, he had written that the pus-tules were seldom white, but more commonly blue, andgenerally surrounded by more or less of an erysipelatousinflammation, but the published Inquiry reads:— At their first appearance, they are commonl}^ of a palishblue, or rather of a colour somewhat approaching to livid, andare surrounded by an erysipelatous inflammation. And in the third edition of the Inquiry the worderysipelatous is omitted. Another instance of modifvins^ oris^inal statements occursin the


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