is noc of that latitucfe , as to explicate by it all the phaenomena 
of. Nature, though he denies noc , that by means of their pow- 
ers very many efFefls, and thofe admirable ones , may be expli- 
cated, fuchas are foluticns, precipitations, diftillations, fub- 
Umations, calcinations , t&c. But that 4iZ cannot be by fuch 
a reaAion accounted for, he inftances Jiyji in the known vercue 
of Alcaiy's upon Mineral Sulphurs, fuch as Salt of Tartar 
or fixt Nitre and Gommon Sulphur , which may be reduced 
into white powder, out of jvhich may be extracted a Tin- 
Sure as well by thefe fixt Salts , as by the volatil ones of Sal 
Armoniacand Harts-horn, and by their means a Sulphur out .of 
Antimony ; ^ttvpithcut any fenfible effervefcence / even when 
rhey are prepared in forma humid a. Secondly, he in fiances in 
divers Rozins difTolved by the WWtes of Eggs witjiout any 
obfervable EfFervefcence , and in TurpentindilTolvmg fcveral 
Gums without any commotion. To thefe he adds the fnftance 
of the Coagulation of Quick-filver by the fume of melted 
Lead, vi^ithout any rcaftion of an Acid afid Alcali , that is per- 
ceivable. 
Befides, he obferves, rhat 'tis doubtful , whether all thofe 
Subftances that do tumultuate with an Acid, areAlcaly's, or 
that do boyl up with Alcaly's, are Acid, For i. Jcidsdo 
boylup with ^r/Wj, and mutually render turbid and do pre* 
cipitate their Solutions; as Spirit of Sale or Vitriol works 
upon the Solution of Silver or Copper made by A^ua^fortis 
or Spirit of Nitre; as alfo Spirit of Vitriol^ and Spirit of Salt 
heats, and turns into a whitifliO^, by a Solution of Saturn, 
made with diftilled Vinegar ; And Aqm-fortu and Spirit of 
Nitre, though they make no fenfible ebuJlition in the faid Li- 
quor, yet they caufe the particles of Saturn to fubfide atthe 
bottom in the form of a whitifli powder. 
Moreover, he notes, that an Acid is put into commotion 
by that which is neither an Acid or Alcaly ; as Oyl of Vitriol 
niing'ed wiih^ither, common or diftilled Water , and likewif« 
with fpirit of Wine and oyl of Turpentine. 
Again, he finds alfo , that neither all what boy Is up with an 
Alcaii,or receivcth it into it felf, is therefore prefently to be 
taken for an Acid ; becaufethe liquor of Nitre fixed by coals, 
and Oyl of Tartar^do a^ well as juyce of Citron, Vinegar, &c. 
feparate 
