[ 26 i ] 
and more tranfparcnt than many hexagonal Shoots ; 
’tis the only one I have feen of its Kind. 
Fig- 4. Tab. V. Is an Afterisk of the cleared 
Spar; its Shoots or Rays arc hexagonal, fweliing, 
or gibbous, in the Middle; their Sides not plain, 
or of one level Surface, as our Cornijh ’Diamonds 
generally are, but ridg’d near the Edges, and fome- 
\v hat hollow, but not uniformly, in the Middle; the 
Points or Terminations were entire and fharp, but 
not to that Degree aculeated as the former conic 
Spar; but it is very plain, that thefe Spires never had 
any hexagonal Apices : The undermoft Shoots fpread 
horizontally ; but the other rife gradually, making a 
greater Angle, till the middle ones make nearly a 
right Angle with the Bafe, which has a ferrugineous 
circular Spot in the Middle, from whence the Rays 
regularly proceed on every Side. Fig. 5. Tab. V. 
Thefe are fome of- the mod lingular Spars which - 
have reach’d my Obfetvation ,* but the general Shape 
of our figur’d Spars is hexagonal ; and thefe Hexa- 
gons either confift of a Shaft or Column, and a 
Point with the fame Number of Sides correspondent 
to the Column {Fig. 6. Tab. IV.) or are only Points, 
that is, pyramidal Hexagons ftuck on at their Bale, upon 
the Surface of their ftony Beds. Fig. 7. Tab IV. 
In a thin Cake or Lump in my Poffelllon,' one 
Half of the Spar fhoots from one Side, the other Half 
from the other; and fo incrufis the Planes of both 
Sides with hexagonal 'Apices. Fig. 8. Tab. IV. 
Here the Spar fas appears by the Tendency of its 
Fibres, when the interior Texture is examin’d) ftrug- 
gled to form Stems or Stalks to thefe Cufpides ; 
but either the Effort was not vigorous enough, or, 
through the Impurities of the Juice, the fparry or 
2 cryftallinc 
