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no more^ than between 7 and 8, can recover from that 
*T>tftem^er^ for one that dies of it. And if any confi- 
rable part of the aforefaid remainder of Mankind, 
more than is allow'd for above, do efcape having the 
Small Pox, then the Proportion of thofe that recover 
from it, will be flill linaller. 
This Confideration Ihews the Fallacy of one plan- 
fible Argument, that has been often made ufe of on 
occafion of the prefent Difputes about Inoculation : 
Which is, that whatever be the Danger of dying of the 
Small Pox, to thofe that actually have that Difeale, yet, 
as great Numbers of Perfons never have the Small Pox 
at all, this Danger is what any particular Perfon may 
never be in ; and therefore it will be Madnefs to under- 
go the hazard of Inoculation, be it great or fmall, in 
order to prevent a Difeafe, which pollibly may never 
befal one. 
For if two parts in leventeen of all Mankind, that 
are above one or two Years of Age, mull: fooner or 
later die of the Small Pox, it is plain, that how many 
parts foever of thefe feventeen are luppofed to efcape 
that Diflemper, the Mortality among the remainder, 
who undergo it, mufl: in proportion be fo much the 
greater. As for inftance, if 7 parts efcape having the 
Small Pox, and 10 undergo it, then x out of 10, or i 
out of that have the Small Pox, mud die of that 
Difeafe. 
- And as it can never be known, whether or no any 
particular Perfon be one of thofe, that are to have the 
Small Pox ; his Hazard of dying of that Diflemper, 
being made up of the Hazard of having it, and the Ha- 
zard of dying of it, if he has it, will be exadlly the 
fame, namely, that of x in 17, or i in 8 or 9, whether 
the proportion of Mankind, that efcape having the 
Small Pox, be great or fmall. 
Nn 
But 
