{ 53^ > 
Jpd'fcrtk, there will remain a fare & Mercuric vulgari , Mer- 
powder, which, being well curiufque diffohitur bona Aqu4 
waflit with fair water to dulci- forti; remanfurm fitpulvU, qui 
fie it, and kept a while in a cum aqua pura, ad comiliandam 
moderate fire to dry it through- ei^ quam voca»$ , dulcedinem , 
ly without making it J will be- prM clotm ^ dr aliquandiu in 
come a cal^^ which I have more tetnperato igne , ad eum penitm 
than once ufed with our Mer- exiceandum citra fufionem , af- 
cury with good fucoefs. 'Tis fervatm^ talem Calcem frabehit, 
true, both in this way and in qua fluries cum MGrcmio nofire 
that ( by ^uartation^ ) Aqua- fel/cifer ufm fuL Fateor equi^ 
fertiSy which is a corrofive li- dem^ turn in hac methcdo^ turn 
quor, is employed to bring the in ilia qux infiituitur pcrQudim.* 
Gold to powder , and therefore tionem, adhiberi Aquara fortem^ 
in a diffident mind fome fufpi- Uquorem [ciLcorrofivum^ ad Au- 
cion may arife, that the Inca- rum in pulverem redigendum^ 
lefcence may proceed only from unde fcrutanti genio fuboriri 
theadtionof the acid particles fufpicio poterit^ Incalefientiamii- 
of the menjlruum , which yet lam fili affioni acidarum parti" 
adhering to the corpufcles of cularum Menjlrui acceptam fe* 
the Gold works upon the rendam ejfe , qu$d harens fti* 
Quickfilver, as Aqua-fortii is amnum jiuricorpuJculis^inMer^ 
known to do: Euc , to omit curium oferetury folenni Aquas 
thofe anHvers that cannot be fonvs more. Verumy (^ut eas re- 
given in few words^after I have Jponpnes Jileam, qu^ paucis tradi 
taken notice, that, if the effeft mn pojfunt,^ pojiquam notavi^ 
depends not on oar Mercury (as ^uud^ Ji Effeltus hie non ciependet 
prepared) but only on the calx^ a Mer curio mjlro (rite prspara- 
it appears not, why this Ihould to^^ Jed a fola€alce , nonpateaf, 
not grow hot with common quare h<£c r^on incalefcat sque cum 
Mercury as well as with ours 5 Mercmiovulgdsi ac noftro; 0- 
I flhall need to add , for the re- pu4 baud fuerit , aliud quicquam 
moval of this fubtil fcrupIe,no ad fcrupulum hunc extmendum^ 
more , than this plain Experi- quam ebvium hoc Experimentum^ 
ment, ( which I twice or thrice quod fequitur , quodque bis terve 
made,) namely, that takings in- a me peraStum fuit ^ adjicerei 
ftead of a Calx of Gold, a com- Sumpfi^ inquam^ Calcis Juri loco^ 
petent number of Leaves of Jufficientem numerum Foliorum 
Gold, fuch as Book-binders and auri^ qualibud utuntur Bibliopegi 
the ef 
