( 475 ) 
the Gage^upon the removal of chefiopple, though 'twas evident 
by the great fweetnefs acquired, that it had nsadea Solution of a 
. great portion of the Mmum.'] 
- But to return to our trfals upon Copper 3 , 
Experiment the Ninth, 
[Wetookfome Filings of Copper, alldin a Vial capable of 
holding fonie two or three Ounces of Water, we poured on them 
ftrong Sp/V/V of S^/ Armonm made without Quicklime, till the 
liquor reached near an Inch above them* Thi^ was done about 
the twentieth of Augufi on the Widay before Noon , and the fol- 
lowing Munday prefently after Dinner it had acquired a deep Blew 
tindture, and loft again fo much of it, that '1 was pale ahiioft like 
common water: Then to fatisfie a I unftopt the Vialjde- 
firinghimtoplacehiseye level with the furface of the liquor, 
which in a minute of an hour or lefs appeared, to his furprlze and 
wonder, to have acquired a deep Blew tindiure, that reached 
downwards to the thicknefs of the back of a knife, the whole 
liquor becoming of the like Colour in four or five minutes more , 
and the Glafs being prefently ftopt again , and left where 'twas 
before, appeared not at the end of nine daies to have loft its tin- 
fiure ; though now and then within that time it feemed manifeftly 
paler than when the Vial was ftopt.] 
NOne o f the former Xryds voith Spirit of Sal Armoniu hiving 
been made in an Hermetically fealed Glafs, it mil not be amifs 
both to diverjife and to eonfrm our Experiments^ b^ jetting down the 
fuccefs ef one made in [ucb a Veffel: 
Experiment the Tenths > 
[We took a round Vial holding about eight Ounces of water, 
and having put into it Filings of Copper and a Mercurial Gage^we 
poured on the Metal ftrong Spirit of Sal Armoniac, till it reach- 
ed to a good height in the Vial, which then being Hermetically 
fealed up, was fet by in a South- window , w here it quickly ac-- 
Q^q q ' quired 
