(-2187) 
of all the difficulries about this Sabje<9;.dependsJ A 
JS^atural Body of a certain I igure being given, to find arguments 
andmarks in the Body it [elf \ whereby to deteS the Place and 
Manner of its P roduBi on : Which Problem he afSrms to hav^, 
forefoivedj that no Scd of Philofophers fliail find jaft, 
caufe, ro except againft the Principles and Notions by him 
fuppofed for its Exph'cation. The Third is defign'd to 
examine the Particular iy^&Z/ included in a Solid y accor- 
ding to the Laws difcover*d in the Refolution of the Ge,« 
neral Problem* The Fourth is to reprefentj. the different 
States or Conftirutions of Tojcany (for Inftance) aud pro. 
poundeth a way of Explicating, the Ph^snomena oi tho. Gene- 
ral Delu9£^ not contrad iting the Laws of Natural Motions, 
And fo much for his defigned Method, As to the Summ 
of the moft remarkable particulars of the whole work, 
it.may be reduced to this* 
Firfi^ he comprehends, what he hath to offer about hi$ 
above-mentioned General Problem^ in three Propofitions ; 
OnA is 5 that if a Solid Body be every way encompafs'd 
with another Solid Body, that of the two was firft hardned, 
which by the mutual conradi cxpreflcith on its furface the 
proprieties of the furfac^ of the other* The Second, is, 
thatJf a Solid Body be every way like another Solid Body^ 
not only as to the condition of its furface, but alfo as to tke. 
inward frame and texture of its parts , it is alfo like to it as 
to the Manner aad Place of its pFodu£l:ion ; excepting only 
thofe qualities ofPlace^ which are often found jn it , and 
are not any advantage or difadvantage to the produ£tioa 
of the Body there lodged. The Th^d is^ that a Body prq- 
duced according to the Laws of Nature^ is pi^oduced-out 
of z Fluid, Where yet he wavetb the firfi: Delineations in 
the produiiion of Solid Bodys , bu| delivers feyera! pqli- 
tions about their Increafe. 
Having thus generallyn confideTld a SoU/l contain dmthin 
a Solid^ he proceeds to a. Particular examjoation of thofe ^ 
various Solids, that are digg'd out of fevera! parts o£ the 
Eai'th3 as Incru[lati9ns 3,; Se4imnti.ot.3Qd^. Mgiflar Bqii^^. 
. ' ^ nek.. 
