200 



Ciixoclasite. — In tliis couaecfcion may be nientioned a mineral tliafc 

 lias been described by Prof. Lewis, of the Academy of Natural Sci- 

 ences, Philadelphia, as eaxoclasite. This mineral occurs in blue calcite 

 on lot 7, range 1 , of Wakefield, in square prisms with their solid angles 

 unsymetrically truncated. Its color is white, generally more or less 

 stained with oxi le of iron, Imtre r3^ia)n, sjms imas inclining to 

 pearly, opaque. 



The name chosen would imply that the mineral in question has a 

 poor cleavage, whereas it has none. Then again, in the analysis given 

 by the same gentleman, two or three per cent, of phosphoric acid was 

 determined. Perhaps Mr. Lewis did not observe the minute prisms of 

 green apatite that sometimes penetrate this mineral, and from which 

 source, no doubt, his phosphoric acid was obtained. 



Scapolite. — This mineral m,iy be regirded as one of the most con- 

 stant associates of the apatite deposits, generally occurring in bedded 

 masses, sometimes alternating with hornblende, producing a banded 

 structure of several feet in thickness. 



At times masses of this mineral are made up of aggregations of 

 huge but rough crystals of a grayish white color. However, some good 

 examples of crystallized forms are met with in many places in Wake- 

 field and Templeton. For localities in the latter township I would 

 refer to Dr. Harrington's report, 1877-78. He says the finest crystals 

 occur on lot H, range 12, and on lot 23, range 13; crystals over one 

 foot in length, although externally rough, are frequently met with. 

 On lot 7, range 7, of the same township, a thick bed of grayish white 

 scapolite was penetrated, enclosing patches of a lamellar dark green 

 pyi-oxene and green apatite. On lot 10, range 10, a beautiful translu- 

 cent variety occui's, and which assumes a ])ink color on exposure. In 

 the township of Wakefield, on lot 17, range 1, fine scpiare i)risms, 

 sometimes niodifi<'.d, of a grayish white color, occur, coating an out- 

 crop of the massive variety. On the next lot, 18, range 2, a grayish 

 translucent massive variety is interstratified with hornblende. On lot 

 7, range 1, doubly terminated prisms with rough exterior planes are 

 liberated from a disintegrating limestone. On lot 6, range 2, a trans- 

 lucent canary yellow cleavable variety occurs, but how associated I did 

 not ascertain. 



