[ 263 ] 
own Impregnation would carry it ; and therefore 
fettling in parallel Lifts or Lines behind each other, 
and their Angles lefs and lefs perfeft, that is, becom- 
ing more obtufe, till you come to the Rock, or 
lifelefs Lump of Spar, which the Effort had no Power 
to move, and thro’ which the impregnated and 
purer Juices cfcaped, according to their Degree of 
Mobility : The Bafe of one of thefe orbicular Lumps, 
which has feven d iftin£b Lifts or Fillets one within 
the other, befides letter Lifts, mark'd (h)‘ t will explain 
what is here fuggefted. Fig. 12. Tab. IV. £ 
Thefe hexagonal Points do not always fit clofe to 
the Body of the Rock, but are' as often found 
mounted upon columnar Shoots of the fame Num- 
ber of Sides ; and thefe are what are commonly 
called Cornifh 'Diamonds : They are generally found 
larger fomewhat at the Bafe, where they fatten on the 
Rock, than at the Top, where they fupport the Cuf~ 
'pis. Fig. 15. Tab. IV. 
Some of thefe Shoots have alfo hexagonal Points 
at each End, as Fig. 14. Tab. IV. and are fome- 
times found fingle, that is, detach'd, and without a 
Root, as the Naturalifts fay, but I have them £lfo in 
Lumps fixed Side by Side, but in no parallel Direction. 
Fig. if. Tab. IV. (if). 
This 
t a. The cleareft Cryftal. f. Small Fillet of purpled Spar. 
b. Sup-pellucid, inclining to 1 g. Flock-white. 
purple. . ' v. Lifts of Spar lefs diftindt. ‘ 
c. Flock-white, not pellucid. Tnac Side on which the Ef- 
d. Large Fillet of purpled Spar, fore was faint, and the Shoots 
e. Flock-white. fcarce perceivable. 
(15) Thefe Shoots are not always ftrait, but are found fometimes 
bent or crooked j but as this Deformity is owing to fome accidental 
inter- 
