358 



Mineralogical Journey. 



scarcity in which they exist. From the accompanying minerals, 

 (which were black Tourmaline and Mica,) I was led to infer that 

 they might have come from one of the high ledges, situated not far 

 from the Beryl mountain, in a south-easterly direction, as I there ob- 

 served several veins of black Tourmaline. The most perfect of the 

 two crystals which I saw, Mr. G. was obliging enough to permit me 

 to take along with me to New Haven, for the purpose of submittmg 

 its angles to goniometrical admeasurement. 



It is a double crystal, the prisms coinciding upon the broad lateral 

 planes, parallel to the prismatic axis, and presenting the re-entering 

 and salient angles, as usual in such crystals. In color, lustre, &ic. it 

 resembles other crystals of the same substance. Its form, so far as 

 it is perfect, will be perceived from the subjoined figure. It weighs 

 2035 grs. Troy, equal to 4^ oz. of this standard. As respects di- 

 mensions, therefore, it is in full keeping with the beryls above de- 

 scribed. The other crystal which I saw, was but little inferior in 

 size, though less perfect as a crystal. It is much to be desired, that 

 a knowledge of the locality may be recovered, as it promises from 

 these specimens, to furnish us with an abundant supply of this hith- 

 erto scarce substance. 



Fig. 1. 



3. J^ermont Zircon. 



The very interesting mineral I am now about to describe was not 

 procured upon our journey ; but as its locality is not very remote 

 from the region we visited, it will not, I am persuaded, be misplaced 

 to connect my account of it with the present memoir. 



The specimens described, were forwarded last autumn in a case 

 of Vermont minerals from Prof. W. C. Fowler of Middlebury col- 



