on the Geology of New Hampshire. 33 
_ quantity elsewhere in the United States) and chlorophyllite, a 
new species, first discovered in this country by Dr. Jackson at 
Unity, whilst engaged in the survey. 
Of the localities of minerals we have a great number described 
in the reports upon the several towns visited. We will mention 
a few of the most interesting and important. 
Acworth.—Here are found the immense beryls which have 
given the place celebrity wherever mineralogy has avotary. ‘The 
largest of the crystals are upwards of a foot in diameter and 
eighteen inches in length; the smaller, however, as is generally 
the case, are the most perfect. The color of them is a light blue 
green, and they are of the variety generally known as the aqua- 
marine. Black tourmalines and soda feldspar also occur here. 
Unity.—In this town isa spring strongly chalybeate, possessing 
tonic properties. Granular quartz, and copper and iron pyrites, 
both in sufficient quantity for exploration, are met with. In this 
place was discovered the mineral chlorophyllite before referred to. 
It occurs in the syenite rocks, not far from the copper mine. 
_ Orford.—Here are quarried granite, limestone and talcose slate. 
In the latter rock, clove brown tourmalines are found in large 
crystals, some of which are more than two inches in diameter 
and six in length. 
Haverhill.—Mica slate, satan extensive beds of excellent 
limestone, granite of Beal quality, and hornblende slate, abound 
here. There have also been found veins of copper and iron 
pyrites, sulphurets of lead and zinc, native arsenic, arsenical py- 
rites, and large crystals of garnet in chlorite. 
Lisbon.—Within the present limits of this town is found the 
well known magnetic iron ore which is worked in the Franconia 
furnaces near. It occurs in granite, and composes a vein from 
three and a half to four feet in width. It is now taken up from 
a depth of one hundred and forty four feet. Accompanying the 
ore are numerous minerals which may be easily procured, among 
others, deep red magnesian garnet, crystallized and granular epi- 
dote, hornblende, &c. In the mica slates of this town, beauti- 
fully crystallized staurotides and garnets are found in abundance. 
Barilett.—In this place inexhaustible quantities of iron ore 
occur, of a character suitable for the manufacture of the best iron 
or of steel, chiefly composed of the peroxide, combined with a 
small quantity of the protoxide and a little manganese. This 
Vol. xu1x, No. 1.—April-June, 1845. 5 
