
Led. IL with feveral Menftrunms, 


3. §, Aqua fortis, and Oyl o Vitriol being poured feverally upon ano-« 
ther fealed pee which was veh by the ge of ss eee i 
both made a very confiderable Effervefcence herewith. Whence it appears 
That there is no {mall difference in the nature, and therefore the opera: 
tion of Bolus Armena and Terra Lemnia. As alfo, betwixt the fealed 
Earths themfelves, one making a great Effervefcemce, another none at 
all. Whereto thofe that ufe them, are to have regard. 
4. §. Next for Stones. And firft, Ivifh slat, with Spirit of Hartsa 
horn, maketh a final, yet vifible Bullition: and it prefently ceaféth. So 
that it ems to be nothing elfe but a Vitriolick Bole. As 1s alfo argued 
from its tafte, which is plainly acid, and fomewhat rough. Whence 
243 
alfo it iswith good reafon given upon any inward Bruifes. Becaufe 
by coagulating the Blood, it prohibits its too copious afflux into the 
affected part. Yet being but gently aftringent, and fo the Coagulati- 
onsit makes, not great ; they are likewife well enough carried off from 
the fame part in the Circulation; by both which means an Inflammation 
may be either prevented, or the better over-ruled. 
5. §. Lapis Hematites maketh no Effervefcence at all either with Al- 
halies or Acids. 
6. §. Powder of the green part of 4 Magnet with Oyl of Vitriol ma- 
heth fome few bubbles, yet not vifible without a Glas. But the powder of 
the black part of a Magnet, which is the faid ftone fully perfect, ftirreth 
not with any acid. Neither doth the calcined Magnet. Hence there 1s 
fome confiderable difference betwixt Jrow and the Magnet. 
7. §. Lapis Lazuli, with Oil of Vitriol, and efpecially with Spirit of: 
Mitre, maketh a.confpicuous Bullition, Hence its Cathartick virtue lyeth 
in an Alkaly. For which reafon it is alfo appropriate, in like manner 
_ as Steel, to the cure of Hypochondriacal Affedtions 5 originated from 
fome kind of fermenting Acid. 
8. Ofteocolla, with Spirit of Nitre maketh yet a greater Effervefcence. 
How it comes to befo great a knitter of broken Bones, as it is repu- 
ted, is obf{cure. It feemeth, that upon its {olution by a Nitrous Acid 
in the body 5 itis precipitated upon the broken part, and fo becomes a: 
kind of Cement thereto. : 
g. §. Lapis Tuthie, with Spirit of Nitre, maketh an Effervefcence 
much alike. And with Oyl of Vitriol very confiderably, But Lapis Cala- 
minaris with Oyl of Vitriol grows flarks as the powder of Alabafter dots 
with water. With Spirit of Nitre it maketh a little Bullition, and quackly. 
But with Aqua fortis, agreat ones beyond any of the Stones above nameds 
Hence both Tutty and Calamy are Ophthalwicks from their Alkaly. 
Whichis alfo confirmed, from the efficacy of fome Alkalies of the like 
ue. Hence alfo Calamy feemeth to partake fomewhat of the nature of 
Silver ; as by tryal made upon that alfo, will hereafter better ap~ 
ear. 
i ro. §. Chalk and Oil of Sulphur or Vitriol make as ftrong an Effer- 
vefeence as any of the reff. Whence it is fometimes well ufed againft a 
Cardialgia. 
11. §. Whiting makes as great an Effervefcence as Chalk, So that it 
feems the faline parts are not wafhed:away with the water, wherein 
the Chalk, for the making of Whiting, is diffolved. 
O02 12, & 


































































