404 Miscellanies. 



village, from which I have obtained well defined six sided prismatic 

 crystals of phosphate of lime from one half an inch to twelve inches 

 in length, and from one eighth to one inch and five eighths in diame- 

 ter. Their color is a bright asparagus green, of fine lustre, and they 

 are variously terminated. Some have equal terminal faces, corres- 

 ponding with the lateral planes of the prism ; while others have one, 

 two, and sometimes three of their terminal faces extended at the ex- 

 pense of others, so as to give the crystal, in some instances, a one, 

 two, three, four, and even a five sided summit of unequal faces. 

 Their gangue is the white lime rock of this vicinity, in a partial state 

 of decomposition, so that by the fingers only it may be reduced into 

 coarse rhombic fragments, and the crystals disengaged from their na- 

 tive bed. J. P. Young, P. M. 



Edenville, Oct. 15, 1832. 



9. Geological Map. — A geological map of New London and 

 Windham counties, is about being published by Mr. Wm. Lester, Jr. 

 from the surveys of Lieut. W. VV. Mather, during the late summer. 

 It is to be accompanied on the same sheet by a very minute map of 

 the two counties, upon a scale three fifths of an inch to a mile, hand- 

 somely colored, varnished, and mounted, from a copper plate en- 

 graving. 



This survey will correct the section published in this Journal last 

 year. A mica slate stratum, crosses that section, though not seen 

 in place on the line of that section. It runs through Franklin, Scot- 

 land, Hampton, Pomfret, Woodstock, and into Massachusetts, and 

 appears to be a continuation of that in Massachusetts described by 

 Prof. Hitchcock, on his map of Massachusetts ; but which appears 

 to run out before it comes to the Connecticut line. It terminates 

 again abruptly in Bozrah, Conn. The granular feldspar and quartz 

 strata of that section, are subordinate strata to gneiss, from twenty 

 to thirty miles in length. They terminate abruptly on the north bank 

 of Morriss river. The contorted gneiss extends from Massachu- 

 setts to Long Island sound, with a breadth from three to ten miles, 

 and underlies the best land on the east of Connecticut river, in Con- 

 necticut, except th^ valley of the Connecticut. The sienite of that 

 section forms a bed or overlying mass, covering about twenty or 

 twenty five square miles, with greenstone, sienitic, and granitic veins, 

 traversing the strata in every direction around. 



W. W. Mather. 



West Point, Nov. 20th, 1832. 



