( 47 ) 
Becaufe Experience is equally the Foundation and 
Touchftone of all reafoning in Phyfick, we will here fub- 
mit our Solution to common Obfervations, and try whe- 
ther every thing propofed in it, does not exaftly anfwer 
Matters of Fad, and the vihble Operations of Na- 
ture. 
Firft then, it plainly follows, that thefe Medicines 2lV The different 
ways purge beft and moft conftantly in a liquid iorm thefe 
becaufe they are more eafily convey’d into the 
and can Simulate more parrs, and that upon the account 
of this their Fluidity 5 whatever may be the way th'st form:\ 
Purges and Vomits work, or whatfoever their Nature 
may be. This explains very eafily a very common Oh- 
fervation, hitherto very difficult to Phyficians, about the 
different Operation of the fame Medicine in different' 
forms : Why, viz. the Infufion'of a due quantity of a 
Purging Medicine produces its effeds fooner and more 
conftantly than a like quantity of the fame Medicine in a 
Powder, tho’ ftill more conftantly in a Powder than a 
Bolus, tho’ ftill fooner and more conftantly in a dry Bo- 
lus, than if it be given in Pills made into that form with 
Gums that do not purge*^ and this difference in Purging 
fliall even be notable, according to the diffolubility of 
the ‘Gums. 
From whence it follows, that the Evacuation made by 
fuch Medicines, is in proportion ro the quantity of thofe 
Medicines that happens to be diffolv’d, and not to the . . 
quantity adminifter’d. 
Secondly, That purging by Draughts is the moft Their effect i 
cellent form, and will always have the moft conftant^#^^"r, 
of the 
* di^CTCHt 
The next Confideration is, that a certain quantity oithicknefs of 
any purging Medicine affeds us after a different manner, 
according to the different Quantity and Conftitution of 
the Blood, or its thicknefs, and it was (hewn in the So- 
lution, that if its thicknefs were the fame, the Dofe 
ftiould ! 
