242 Messrs. Jackson and Alger on the 
by Martial’s Cove. The rocks at this place, and the veins pre- 
sented by the neighbouring coast, cannot fail to reward the labor 
of those who may visit this spot, as scarcely a week passes, 
without the downfall of some impending cliff, that scatters its 
treasures along the shore, before shaded by its brink. Here 
the heulandite is not confined to spheroidal masses as a mere 
constituent of the amygdaloid, but exists in veins sometimes six 
inches wide, extending vertically from the base of the precipice 
to its very summit. Some of them, that have fallen with the 
masses of trap, exhibit broad folia of a pearly white appearance. 
This heulandite, usually colorless and transparent, is sometimes 
of a red color, like that from Scotland and Germany. 
But in speaking of the interesting productions of this place, we 
should not pass over a very curious, and, in fact, hitherto unknown 
association of analcime with native copper. The analcime occurs 
in the form of the primary crystal, and by the replacement of 
these planes on all its solid angles, presents the passage of that 
form into the trapezohedron.- It is of a verdigris green color 
externally, but, towards the centre of many crystals, this color 
diminishes in intensity, and in some it entirely disappears, leaving 
them transparent. They also approach the emerald green. The 
copper is partially imbedded in these crystals, sometimes in glob- 
ular concretions of about the size of a common pin’s head, and at 
other times in minute filaments, having one extremity attached to 
the amygdaloid, in the cavities of which they both occur. These 
globules are soft and malleable, and, when scraped, possess the 
brilliant lustre of pure copper. The crystals presenting them- 
selves under an aspect so new and beautiful, induced us to exam- 
ine them more particularly in order to ascertain the nature of 
their coloring matter. As the amygdaloid contained a portion of 
