( 49 ) 
'ut^ing and Vomiting Medicines in prefent ufe 5 better 
dapted to Experience than are hitherto to be found. 
The Method of framing fuch Tables, is by fetting o&fioiv they art 
he pradicable Conftitutions in the different Ages that I 
lave obferv’d to take notable Quantities of Purging and 
'■bmiring Medicines 5 fo that by comparing thefe Condi- 
utions with the Ages, v/e have the different Dofes in all 
hofe cafes, which is all that is requir’d for a better pra- 
fice 5 tho’ a more proper occafion may produce a more 
lice and exaft divifion of Conftitutions, very much to 
he advantage of the Pradice of Phyfick in all Difeafes. 
The Ages wherein thefe different Dofes are taken, I 
ind to be four 5 when a Man is about 16 or 20 Years of 
\ge, and weighs about 12 Stone,, he then takes thecom- 
non Dofe : One of nine Y^ears takes three quarters of 
hat ^ one of fix the half,and one of three Years a quarter. 
Vlorcover, it having already been (hewn, that the 
ale healthy Conftitutions are but three, as alfo the nota-^j/ 
ble Pulfes of each of thefe: Let then thefe Conftitutions p. 1124. 
be as 2, 5, 4. That of the moft fluid Blood as'^e'^-^- 
the firft number, and fo on ^ in that cafe, the Dofe of 
iny Pcrfon will be found by multiplying the common 
Dofe for his Age into the Square of his Conftitution and 
dividing by the Square of the middle Conftitution. For 
inftance, If 5 )* CaJ/t£ is the common Dofe, or the Dofe 
of the middle Conftitution, oiij* and^r. 15 f is the 
Dofe of the firft Conftitution, and^xiv. 19 ^ that of 
the grofleft or laft Conftitution 5 and fo proportion ably 
for every Medicine in all the Ages, as appears by the 
Tables. 
This Method feems to anfwer fo exadly, (hat there is Ojilyexcep- 
not any thing neceflary befides, except a Perfon is more 
Loofe or Coftive than ordinary ( which may be known 
from the Patient or otherways) it is fo be reputed the 
fame, as if he had taken an equivalent quantity of a Me- 
dicine proper to produce thefe effeds. Any Phyfician, 
- - H who 
