392 



Intelligence and Miscellanies. 



agement necessary, however. They first endeavor to select 

 a thicket : they next dig away the snow to the ground, with 

 a snow shoe, which they always carry, and build a large fire. 

 They then (after boiling their chocolate, &c. &c.) cover a spot 

 close to the fire, with some small boughs of evergreens, such 

 as hemlock or spruce, and if it storms, raise a little covering of 

 evergreens over them, a little resembling a rural cot. There, 

 with two blankets, they will lie down by their fire, dogs and 

 all, and sleep comfortably all night. 



13. Measurements of Crystals of Zircon, from Buncomb, 

 North Carolina; by Charles U. Shepard. 



The Zircon, of whose crystals are subjoined figures, was 

 discovered in 1820, by Dr. T. D. Porter, and described in 

 Vol. iii, p. 229, of this Journal. It is so interesting from the 

 unusual dimensions, and perfection of form, possessed by its 

 crystals, that I am persuaded a more particular account of it 

 will not be unacceptable, and may be of use in leading some 

 mineralogist to explore a locality which has been too much 

 neglected, for one, which promises to be so peculiarly rich. 



Dr. P. does not mention whether the Zircon is found im- 

 bedded or detached ; but as all the specimens furnished by 

 him, to the Yale College cabinet are loose, and as some of them 

 present rounded angles, and occasionally have their cavities 

 occupied by a soft decomposing feldspar, it appears probable, 

 that they might have occurred in an alluvial situation, agree- 

 ably to the manner in which they are found in other coun- 

 tries. The fine lustre of the crystals enabled me to avail 

 myself of the use of the reflective goniometer in determining 

 the value of their angles. 



^r 



P on P, or P' on P' over the summit - 95° 30' 



a - - - - 132 15 



o - - - ' - 162 



o — a - - - 152 



a — i - - - - 135 



