205 



Its color varies from a light yellow to a dark green, often revealing a 

 shai-p conchoidal fracture. In the neighborhood of Chelsea, serpentine 

 limestone is interstratitied with other bands enclosing apatite crystals. 

 In the same limestone bands of a semi-fibi'ous yellow variety occur, 

 resemblir.g the structure of hornblende, and possibly pseudomorph after 

 that mineral. On lot 7, range 1, of WakeSeld, large lenticular masses 

 of a translucent green serpentine occur in limestone. It breaks with 

 a sharp conchoidal fracture, and is occasionally marred as an orna- 

 mental stone by inclusions of a foliated graphite and large masses of a 

 white raicaceous-lookins: garnet. 



Chrysotiie, or Serpentine Asbestos. — This mineral occurs in tha 

 neighborhood of Chelsea, forming concentric veins in a serpentinous 

 limestone. The fibres are sometimes an inch and a half in length, and 

 I'ather too strongly coherent, I think, to be of any immediate commercial 

 value. Other localities in the neighborhood of Templeton have afforded 

 a similar mineral, the fibres, however, in this instance being more 

 separable. A quantity was mined some years ago from one of the 

 latter localities, but with what success I am unaware. 



Ripidolite. — A greenish foliated mineral occurring on the west 

 half of lot 18, range 9, of Templeton, is referred by Dr. Harrington to 

 this variety. 



Prehnite. — This mineral was noticed at Post's mine in Templrton, 

 ill greyish white, strongly coheren% mammillated groups ; in cavities in 

 pyroxene. It has also been noticed elsewhere in the same township. 



Zeolite group. — Four repi'esentatives of this family have been 

 noticed in the above townships, viz., stilbite, chabazite, natrolite and 

 heulandite. The first mineral, stilbite, occurs in small, .sheaf like 

 aggregations of a yellowish or white color, associated with epidote,. 

 lining cavities in a massive girnet rock on lot 18, range 2, of Wake- 

 field. A mineral in acioular tufts resembling natrolite is also often, 

 associated . 



The mineral chaljazite occurs at Haldane's Mine, in the same- 

 township, in transparent to translucent rhomltohedral crystals, often a 

 quarter of an inch across. Their color varies from colorless to wine- 

 yellow, and frequently fine illustrations of penetration twins may be 

 observed. I also noticed a similar mineral at Post's Mine, in Tem- 

 pleton. 



