'Thus much for the External nature of Snow j let us next a 
little enquire isto its EJJential nature. 
Now if we would make a judgment of this, I think we may 
beft do it by confidering^ what the general f/^^re of Sciow is, 
and comparing the fame with fuch regular figures as we fee in 
divers other bodies, in that where we fee the like configurati- 
onSj we may believe there is the like lubjea wherein, ox th^ 
like efficient wherehy^oth thofe and thefe are made. 
As for the Figure of Sno 'tis generally om,vi%.ih^t which ^ 
is above defcribed : Rarejy of different ones, which maybe 
reduced chiefly <o two generals^ Circulars and Hexagonals, 
either fimple or compounded together. More tarely, either 
tobcfeenofmore than6 points^ but if fo, then not of 8 or 
1O5 but i2* Or infinglefhootSs as fp roany fhortflender Cy- 
lindcrs, like thofeof Nitre. Or by one of thefe (hootSj asthe 
Axle treCj and touching upon the Centre of a pair of pointed 
Icicles, Joined together as the two wheels* Or the fame hex- 
agonal figure, and of the fame ufual breadth 5 but continued 
in thicknefs or profundity, like the ftone, which, aslremem- 
htr^Boetim czlh Afiroites. All thefe, I fay, are rare, thefirft 
defcribed being the General figure* 
As for the Configurations of other bodies, we ftiall fiod.that 
there are divers v/hieh have fome a left, others a more near re- 
fcmblance hereuoto* Nitre is formedjas is commonly kngwoa 
into long Cylindrical fhoots , as alfo all Lixivial Salts iox the 
moft pait ; refcmblingj though not perfectly, the fever^I 
points of each Starry icicle of Snow. Salt of Harts horfr 
Armoniac^ and fome other volatil Salts,bcfides their main and 
longer (hoots, have othersj (borter branched out from_ them^ 
refembling as thofe the main, fo jhefe the Collateral points of 
Snow. But the Icicles of W^^e areftill more neat : For, in 
SJtof Harts-horojakhoughthe Collateral fliootsftandat acute 
Angles with the main , yet not by pairs at equal height : And 
ia Sal Armoniacy although they ftand diametrically oppofite, 
or at equal height 5 yet withallat right^ not acute,^ angles : 
Wbv^reas in the Icicles of Urine they ftand at equal height^ and 
at acute angles both 5 in both, like thofe of fnow* And it is 
obfervable, ihattheconfiguratioR of Ff^i^^^r/ is likewife the 
