( 111 ) 
But as what has been faid concerning the Hazard of 
the natural Small Pox, is taken from an Account of 
Years; whereas the Hazard of Inoculation is eftimated 
only from what has happen'd in the fpace of about i8 
Months, fince which time it had its hrft Rife among 
us ; it will perhaps be asked by fbme Perfbns, why 
we do not likewile make the Eftimate of the hazard of 
the natural Small Pox, from the lafl two Years alone, 
without running back into fo great a number of Years, 
before Inoculation was begun ? 
To which we anfwer, that the Proportion of thole 
that die of the Small Pox, varies fo much in different 
Years, as appears from the Tables above, that it was 
impoffible to come at any Certainty in this point, from 
the confideration of the two fall Years alone : and if 
any one fulped:s us of Partiality in proceeding after the 
manner we have done, he need only call his Eyes upon 
the fecond Table, where he will find, that the Morta- 
lity of the natural Small Pox, for the two lall Years, 
has conliderably exceeded the Medium we have de- 
termin’d, from taking in two and fourty Years. 
There is another Method, which, if it were put in 
pradlice in leveral large Towns, or Parillies, and for a 
lufficient Number of Y ears, would enable us to come 
at a nearer and Hill more certain Computation of the 
Proportion between thofe that recover, and thofe that 
die of the Small Pox : which is, to fend a carefiil Per- 
fon once a Year, from houfe to houfe, to enquire 
what Perfons have had the Small Pox, and how many 
have died of it, in the preceding Year. This has been 
done by Dr. Nettleton the lad Year, at leveral Towns 
in Torkjhire^dcc. and the fame was done at Chichefter 
for the fame Year, to the 15th oiO[ioberhS!i^ by a 
Perlbn of Credit, whole Account was communicated to 
me by my learned and ingenious Friend, Dr. 
Sucli 
