Part of the county at the confluence of the Concord and Merrimack rivers, about 25 m.
Minerals.-The most important of the mineral products of New Hampshire, which has long been known as " the Granite State," is granite, which is quarried in the southern part of the state in the area of " Lake Winnepesaukee gneiss," near Concord, Merrimack county, near Milford, Hillsboro county, and E.
Theyare the Connecticut, Merrimack, Kennebec, Penobscot and St John, the last being shared with the province of New Brunswick.
CONCORD, the capital of New Hampshire, U.S.A., and the county-seat of Merrimack county, on both sides of the Merrimac river, about 75 m.
Its centre is Monument Square, in Merrimack Street, where are a granite monument to the first Northerners killed in the Civil War, Luther C. Ladd and A.
The opportunity for developing water-power by the purchase of the canal around Pawtucket Falls (chartered for navigation in 1792) led them to choose the adjacent village of East Chelmsford as the site of their projected cotton mills; they bought the Pawtucket canal, and incorporated in 1822 the Merrimack Manufacturing Company; in 1823 the first cloth was actually made, and in 1826 a separate township was formed from part of Chelmsford and was named in honour of Francis Cabot Lowell, who with Jackson had improved Cartwright's power loom, and had planned the mills at Waltham.
JOHN GREENLEAF WHITTIER (1807-1892), America's " Quaker poet " of freedom, faith and the sentiment of the common people, was born in a Merrimack Valley farmhouse, Haverhill, Massachusetts, on the 17th of December 1807.
FRANKLIN, a city of Merrimack county, New Hampshire, U.S.A., at the confluence of the Pemigewasset and Winnepesaukee rivers to form the Merrimac; about 95 m.
He was on Governer John Letcher's advisory committee of three voting to raise the Merrimack and he became the head of coast, harbour and river defences.
The power gained from the Pawtucket Falls in the Merrimack river has long been found insufficient for these.
Mica, first mined at grafton|Grafton, Grafton county, in 1803, found also in the northern part of Merrimack county and in the north-western corner of Cheshire county in such quantities that for sixty years:New Hampshire was the largest producer of mica in the United States, is no longer an important product: in 1907 its value ($7227) was less than that of the mica produced in South Dakota, Alabama, North Carolina or Colorado.