(lU) 
{leneral Heads for a Natural Hiftory of a QfOmttty fimt 
or [mall^ imparted likemfe by Mr. Boyle* 
It having been drQ^dy intlmned (Num.2, of Phil. Tran/aB. 
p. I40. 141.) th^t divtrs Phikfophers airaejaraong other things, 
at the Corapofing of a good Natural Hiftory, to (aperftru£t, in 
.time, a Solid and ty^/i;^/ thilolophy upon ; and it being of no 
.flight importancej tobefurni(ht with pertinent Heads, for the 
dircftion of Inquirers; that lately named Benefaiiour te Expert- 
mental Philofophy^ has been pieafed to communicate, for the 
ends abovefaid, the following ^mV/^/, which ( as himfelf did 
fignifie) belong to one of his of the unpubUlht part of 
the Vfefubiefs of Nat. and Experimen. Pkilofophy, 
But firft he premifes, that what follows^ is defign*d only to 
point at the more Gmeralhtzd% of Inquiry, which the pro- 
pofer ignores not to be Divers of them very comprehenfive, in 
fomucbj that about fome of the Subordinate (nhjcOls, perhaps 
too, not the moft fertile, he has drawn up Articles of inquifition 
about particulars, that take up near as much room? as what is 
here to be deliver'd of this matter. 
The Heads themfelves follow • 
The things, to be obferv'd in fuch x Hiftory^ may be vari^ 
oufly( and almoft at pleafure) divided: As, into Supraterrane- 
eus^Terrefirial^ Md Subterraneous > and otherwife : but we wiH 
at prefent diftinguifli them into thofe things, that refpcdl the 
Heavens^ or concern the Air^ the Water, or the Earth. 
I. To the Firfi fort of Particulars, belong the Longitude 
and Latitude of the Place (that being of moment in reference 
to the obfervations about the Air ^(t.) and confequently the 
length of the longeft and fliorteft days and nights, the Cli- 
mate, parallels i^o. what fixt ftarrs are and what not feen 
there : What Conftellations *tis faid to be febjed: to ? Where- • 
unto may be added other Aftrologica! matters , if they be 
thought worth mentioning* 
3, About 
