ALUMINA. 
331 
Fig. 282, the dioctaedre of Haiiy, in which the replacing tangent planes are broader ; 
Fig. 283, in which two of the replacing planes are much larger than the other two, giving 
the crystal a flattened form ; 
Fig. 284, in which the edge between Z and Z is replaced by the plane t; 
Fig. 285, in which the edge between M and Z is replaced by the plane z; 
Fig. 28G. 
Fig. 287. 
Fig. 288. 
M 
on 
. Z 
112° 
30' 
M 
on 
s 
135° 
00' 
M 
on 
t 
113° 
34' 
M 
on 
X 
153° 
26' 
M 
on 
z 
140° 
IV 
Z 
on 
l 
136° 
22' 
Z . 
on 
s 
122° 
10' 
Z ( 
on 
t 
158° 
IV 
Z ( 
on 
z 
151° 
38' 
s on 
X 
161° 
34' 
z 
on 
z 
150° 
18' 
{Ilaiiy). 
in 
this 
county. 
Near West- 
Orange County. There are several localities of scapolite in this county. 
Point, it is in large, white and compact masses, associated with pyroxene. At hall hill in the 
town of Monroe, there is a very compact variety of a white and bluish white colour, and 
having a flat conchoidal fracture. It is associated with the beautiful lamellar pyroxene, here¬ 
tofore noticed. 
At Two-ponds in the same town, there is a remarkable locality of crystallized scapolite. 
The crystals are white and reddish white, opaque, and sometimes rough. I hey are often 
very large, and grouped. One of them is nearly ten inches in length, and five inches in 
diameter. It is associated with pyroxene, sphene and zircon. 
The same variety is also found at Greenwood furnace ; while that which has been called 
Meionite, but which is seldom transparent, occurs in the form of minute crystals or grains in 
limestone at the Two ponds, the Forest of Dean and elsewhere. It is often associated with 
red calcareous spar. 
