( tSi ) 
V. Kemarh^ concerning fa^itiom Salts i drawn 
from a Difcourf^ written by Sen.Ytmci^co Redi. 
TH E Happy Genius of the Cardinal de Medici fa- 
vouring and promoting Mathematka! and Phi« 
lofophical Studies, as well as others, makes him 
among his moft weighty Affairs^ not pafs by fuch things 
as may ferve the Virtuofo's as well for Private as Publick 
Advantage,henceit is that Seignior Francis ReJi has beea 
induced to colleca: divers Writings and Obrervations 
made fome Years paft in Florence^ about Vegetable 
Salts which being not ready to be publiflied, you will 
here receive an Extrad of them, for the Satisfadtion of 
the Curious, agd the Improvement of Natural Know*- 
ledge, being hereby conduced into the Manner of ex- 
tra^ing the Salts, their Quantity and Different Figures, 
as likewife their Virtue and Purging Quality^ 
Preparation and Circum[lances. 
I. Burn any (brt of Herb, Flower, Fruit, Wood, or 
whatever it be, and make A&es thereof, with the Alhes 
and with pure Water in its natural Temper make the 
Lye, which after ftraine through moift Paper or a Fil- 
tre, (b that it becomes as clear as poffible. Afterward put 
the Lye into a Glafi Veffel, and let it remain in Bdneo 
Maria until fuch time as a great part of it evaporates, ac- 
cording to the Proportion obferved by thofe that are uftd 
to filch Operations, and according as the Congelation of 
the Salt is defired to be more or lefs expedited or re- 
tarded. 
V V t. If 
