f 
( 8i ) 
the Bark dry’d, weigh’d one Ounce, two Drachms 
and a half ; the lofs this way is three Drachms and an 
half. 
I boil'd thefe remains in feveral Waters, until they 
would no longer tinge the Water, which being eva- 
porated yielded one Drachm and an half of extracft; the 
remains of this dry’d weigh’d one Ounce and half a 
Drachm ^ the lofs by this Method is half a Drachm. 
I, took two Ounces more of pick’d Bark, and boil’d 
it in feveral Waters, ’till the Bark gave no more Co- 
lour ; and then upon an Evaporation of the Water, 
had two Drachms of Excrad. The remains being 
dry’d weigh’d one Ounce fix Draclims ; here the loft 
was not any thing, except (b much as might anfwer 
in weight to the quantity of the Menjlrmm left in 
the Extract, which Allowance mud likewifebe made in 
the other Extrads. 
f digefted the remains in redify’d Spirits of Wine, 
uncill they no longer ting’d the Spirit, and by a very 
gentle Evaporation, I found remaining one Drachm of 
Refinous extrad. What was left, when dry’d, weigh’d 
one Ounce, two Drachms, and an half; in this the 
lofs was two Drachms and an half. 
The Difference in the quantity of Extrad obtain’d 
by thefe two different Methods, is but half a Drachm, 
and the Medium between them, upon putting together 
the feveral Extrads made with Spirit of Wine and Water, 
is in the whole but three Drachms and a quarter. But 
the Extrad made with Spirit of Wine alone, is no 
more than two Drachms from two Ounces of the Cortex, 
inftead of ten Drachms, which it ought to have 
yielded according to Monfieur Boulduc, 
IX. An 
