[ 264 ] 
This is the general and mod common Appearance 
of our Cornifh figur’d Spars and Cryllals, f uiz. cither 
hexagonal Points on the Rock, or common Spar, or 
fixed on Shoots or Columns of the lame Figure ; 
but we mud not imagine, that Spar afi'umes no other 
Shape, but what has been here mentioned. There 
are alfo trigonal and cubical Spars ; but of thefe Sorts 
I have not yet feen any in Cornwall ; however, as our 
Obfervations in this inquifitive Age are daily grow- 
ing more extenfivc, it is very probable, that new and 
undeferibed Shapes of Spars may often fall under our 
Notice: What I have here mentioned feem molt 
worth notice 5 but to pretend to number them all, 
would be very extravagant j for they are varying 
every Day upon our Hands, and new Mines throw 
forth new Forms, according to the different Combi- 
nations of their Solids, and the Impregnation of their 
Waters. 
Sect. 4. 
Whence the hexagonal Shape of Spars . 
It has been obferved before, ( p . 257.) that Water 
and the fparry Juice, confidered Pimply, without 
any other Aid, will produce only the irregular, 
fhapelefs Malles of Spar, incapable of any Activity, 
or Struggle towards Shape and Figure, and deter- 
mined only by the common Principle of Gravita- 
tion, to that Pofition in which we find it : We mult 
call 
interpofing Force orObftruffion, during the Time of forcing, it will 
not, I apprehend, make the Body of a different Species, as long as all 
the other common Properties are continued. 
