C20S7) 
An Accompt cfTrvo Books* 
U tKAC TS written, hy the Hommahk R.OBEKT BOYLJE, akut the <7 0 SM /- 
€JL ^u^ahties of things the temperature of the S 1) B - 1 E R.jR. A JSL E A L and 
SV B- M A R,fNE Kegtms ; and the B 0 TTO M of the Sea % together with an hi' 
troduaidntothe HlStOKT of FAKricVlAR, ,^«//r/w, Oxford, id 70. m 8°. 
rp'He main Deiign of the Noble Author in thefe as well as his other 
PhyHcal writings, is, to provide flill more and more Materials for 
the Hiftory of Nature. He prefixes to thefe Trads an Introdudion to 
iht Hiflory of particukr ^^aImeSj2ihQr he hnh ^\rQ2LdY given us an Ex- 
cellent Account both of the Nature, and of the Origine of Qualities in 
general. Kvii. intending now, to proceed to Qualities in particular^ and to 
con/jder,How far the manner whereby they are produced, and thofe o- 
ther I^hosnomena of them, that may upon occafion be taken notice of, 
will accord with,and, by doing fo, confirm the Dodrine hitherto pro- 
pofcd by him • and whether they will not (at leaft) much better comport 
with Z^^f, than the Opinions either of the Perlpatetick^ ^or the ChymiHs. 
Bt^t before he defcends to mention any of thefe Particular Qualitie?, 
he thinJcs it worth while to confidcr fome Scruples about the Corpufcula- 
rian Docftrine touching Qualities, which unlefs they be removed, may 
not a little prejudice the reception of a good part of what he purpofes 
to deliver about particular C^alities. 
Of thefe difficulties he infifts chiefly upon that Grand one, which im- 
ports,that 'tis incredible, that fo great a Variety of Qualities, as we 
adually find to be in Natu**ai Bodies, /liould fpring from Principles fo 
few in number as two, and fo firaple, as Matter and Local Motion : And 
here be endeavours to l]iow,not only, that the other Cathoiick AfFedi- 
ons of Matter are manifeftly deducible from Local Motion • but alfo,that 
thefe Principles,being varioufly aflbciated, are fo fruitfull, that a Vai^ 
number of Qualities, a:nd other Phcenomena of Nature may refult from 
them. 
In the Trad of the Syfiematical or Cofmlcal ^Jfalities,hc makcth it out. 
That in eflimating the Qualities of Natural Bodies, we are not only to 
confider the power, any particular one hath of ading upon, or the ca- 
pacity it hath of fuffering from fuch and fuch particular Bodies • but 
alfo that there may be fome Attributes,which may belong to this or than 
Body, and divers alterationsjto which it may be lyaWe upon the account 
Of a Syfteme fo conftituted as our Vv%rid is ^ whofe Fabrick is fuch, that 
there may be divers-unheeded Agents, which, by unperceived mean--,may 
have great operations upon the Body we confider^and work fuch changes 
in it, and enable it to work fuch changes on other Bodies, as are rather 
to be afcribed to fome un-obferved Agents, than to thofe other Bodies, 
with which the Body propofed is taken notice to have to do. 
To this is fubjoyned an Appendix touching Cofmkd Stifpicions. For, the 
Author confidering, that the World i-s a Subjed fo vaft.that not only all 
demonftrable Truths, which may be difcovcred concerning it, may be 
look't upon as important, but even CmjeUures and Suppojttions themfelves 
that relate to it in gener^il, may deferve not to be altogether palfed by 
in 
