( 50 53 ) 
To this he adds another great ufe of Dlgefiims^ in duly prc- 
pariDg the EJfences of Mineral Sulphurs 5 initancing by an exp^ 
riraenc made upon C(?r^i//j as moft clearly of all reprefenting 
that great power of Digeftions. Hepoured then feme years 
agc-e upt n fragments ot J^d Coral anOyI, which among ail 
diftiiled Vegetables isj as far as heknows^ the mildeft j defi^ 
roustotry, whether he could extraft a Tiofture therewith. 
But finding after a long time no change at all in the Coral nor 
Oyle, he laid by all thoughts of it. But having one Winter o- 
thcr things to digeft in a digefting Furnace, he thought good 
to refume that Corallin Operation, and to give the Bok head^ 
wherein that matter was yetcontain*d,a place there, not with- 
out good fuGcefs* For within a moneths time, when he ftirr*d 
it as he ufed to do, he perceived, that the bitts of Cora! had a 
higher colour^ and were grown fofter, yet without any change 
in ihe Oyle. He therefore continued the fame degree of hear, 
and after fome days faw, to his wonderj, That the Corals were 
altogether dilTolved into a z^^ry red Mucilage, yet iht Oyl ftill 
fwimming upon them in their priftin form, without having re- 
ceived any tincture at all. He did (hake the veffel vehement- 
ly and often, to fee whether he could unite the Oyl with the 
Mucilage of the Corals ; but all was in vain, the Oyl ftill af- 
cending when the veffel was at reft, and the Mucilage fubfi- 
ding. Whereupon he tried^ whether he could combine them 
by digeftion^ but that alfo not fucceeding, he powred off the 
Oyl (which he found to retain almoft its former (cent and 
tafte) and powred upon the remaining Mucilage fome Tafta- 
rifed Spirit of Wine, of which by a (hort digeftion it was re- 
i folved into a highly red Tindure. 
' By thefe two Experiments the Author thinks, he hath made 
it evident ^ of what value the hitherto negledred works ofDi- 
: geftionare, as alfo given a hint of the great efficacy there is 
I in Volatil Saks, if they be fetter'd, and kept horn avolation* 
Secondly^ to £hew the power and ufe of Fermentation in Chys 
miftry,heinftances firft in z true Volatilisation ofs alt of tartar 
means of the fame, pafling by what he faith he hath performed 
thereby upon j^ntimony^ Pearls^ Coral^&cc, to be Gommunicas 
ted hereafter, in his intended full Dekription of the Opera- 
j tions made in the famous Laboratory oi Gottorp, He faith then, 
1 that to obtain the Spirit of the Volatil Salt of Tartar, he pro. 
Fffff 2 , . ceeded 
