Led. IL with feveral Menfiruums, = 45 
hereto you only add a drop or two of Water, they prefently boil up-with very 
great vehemency. The Caufe is obfcure 5 yet it is well known, that 
Water it felf will diffolve Iron: fo that it appeas, as well by this, as 
by fome other Experiments, that even in common Water, as mild as it 
is, there is fome kind of corrofive Principle, 
23. §. Antimony with Spirit of Nitre, and Aqua fortis feverally, 
maketh an Effervefcence 5 fomewhat lower than Iron. Wath Oil of V; '- 
triol the Buliition is fo fieall, as difficulty to be perceived with a Glafs. 
Hence it feemeth to be ofa very compounded natures if I may fo call 
it, a fubacid-alkaline Metal. ' 
24. §. Antimoninm Diaphoreticum, with Spirit of Nitre and Oil 
of Vitriol feverally, makes a confiderable Effervefcence. Wherefore it is 
not an ufelefs Preparation ; as from the Calcination and Ablution ufed 
therein, fome have thought. 
25. §. Bezoardicum Minerale, (that upon which I made tryal) 
Stirreth not at all either with Alkalies or Acids. To which, let thofe 
who make ufe of it, have regard. 
26. §. in, with Spirit of Nitre, makes fo hot and vehement an Ef: 
fervefcence, that it turns prefently, as it were, intoa Coal. It makes 
alfo a fair Bullition with Oy! of Vitriol. And a gentle one with spirit 
of Salt. Wherefore, it hath {omething of the nature both of Iroz, 
Lead, and Copper. 
27. §.. The like remarkable circumftance is fee in the mixture of 
Aqua fortis with Tin, as with Iron. For Tin and Srong Aqua fortis 
of themfelues will not Stirs but add a few drops of water to them, and 
they boyl up with the greateft vehemency. 
28. §. Copper, with Spirit of Salt, and Oyl of Vitriol feverally, ftirs 
not at all. Spirit of Nitre, and Aqua fortis, both boil it up vehemently, 
Neither Spirit of Harts-horn,zor Spirit of Salt Armoniac maketh any Bul- 
lition therewith. But both of them, by a gentle folution, that is, gently 
feparating its Sulphur from its Salts, turn it blue. Hence Copper hath 
a greater proportion of acid than amy of the forementioned Me- 
tals. 
29. §. Silver, neither with Spirit of Salt, nor Oyl of Vitriol makes any 
Bullition. With Spirit of Nitre it makes one, but tis foow over: and ther 
continues to diffolve flowly into white Coagulations. It alfo maketh with 
Spirit of Harts-horn, or of Salt Armoniac, a full and deep blue. Hence 
there is a greater proportion of acid in Silver, than in Lead, Mercury, 
Iron, Antimony, Tin, or Copper. 
30. §. Litharge of silver maketh the greateé Effervefcence mith Ogl 
of Vitriol. Yet fome with spirit of Nitre. And with Spirit of Salt Ar- 
moniac maketh fome little huff or elevation. And being mixed with Spi- 
rit of Nitre and Spirit of Salt Armoniac both together, produceth a faint 
blue. Hence, although the far greater part of this Litharge be but 
Lead; yet, it feems, it hath fome fmall mixture of Silver. But that 
of Gold {eemeth, for contrary reafons, not to have any Gold. 
31. §. Gold maketh no Effervefience with any fingle Salt I know of. 
But it is commonly diffolued with Aqua Regis, which is known to be az 
alkaline Liquor. Whence it feemeth, That as Lead is the meof? alka- 
lizate, fo Gold the moft acid of Metals. 


























































