( $6 ) 
Root, Herbs, Leaves, Tops, Flowers, Fruit, Nuts, 
Bark and Wood. 
Having thus reduc’d within a (mail compafs the mod 
confiderable Virtues of Plants, both General and 
Specifick, and Ihewn the mod caly, fimple, and natu- 
ral Method of diicovering them, l would not be To far 
mifunderdood, as if I were averfe from ufing other Ex- 
periments in finding them our. On the contrary, I 
could heartily recommend another Mechod, hitherto 
much negleded, and which I am convinc’d would be 
of great Ufe, if accurately gone about ; and that is, 
their Infufion in different Liquors, in order to find out 
the proper Menftruum for extrading their more ufeful 
Parts. 
Every Phyfician is fenfible that there are feveral Sim- 
ples, and thefe fpecifick too, which adhibited in Sub- 
dance, are of great efficacy ; whereas, if their Con- 
texture is difiolved, their Parts can never be fo reuni- 
ted as to produce the fame effed. Thus Cortex Peru- 
vian's is never fo effedual, as when given in Powder. 
That there are others which will communicate their 
ufeful Particles when infus’d, to one Liquor and not to 
another ; and that the fame Subdance will impregnate 
two Liquors diverfely, according to the different Men - 
ftruums. That expert Chymid, Mr. Lcmer), advifes to 
infufe Opium in Water and Spirit of Wine, feparately ; 
and after to mix both Infufions together, in order to 
make the Laudanum or Extrad ; wifely confidering, that 
the Water will be impregnated by the more foluble fa- 
line Particles, whereas the Spirit will only imbibe the 
more refinous ; for Water is the proper Mcnftrmm for a 
faline Subdance, which will not difiolve in Spirit of 
Wine 5 this rather hardening and preferving it from 
being diffolv’d, either by Air or Water. Thus the 
mod convenient way to preferve the volatile Salt of 
Animals, 
