Grind, gate), forming the boundary between the parishes of: Northmavine and belting, is only 60 yds.
Within the city limits and furnishes water-power for factories; among the manufactures are textiles, boots and shoes, leather belting, sash, doors and blinds, carriages, machinery and bricks.
Belting intended for driving machinery is built up of canvas which has been thoroughly frictioned with the soft mixed rubber, and is cured by placing it in a kind of press kept by means of steam at a dry heat of about 140° C. Packing for the stuffing boxes of steam engines is similarly prepared from strips of rubber and friotioned canvas, as also are the so-called insertion sheets, in which layers of rubber alternate with canvas or even wire gauze.
The principal manufactures are belting, woollens, tinners' hardware, iron and gasolene motors.
The city has various manufactures, including flour and grist mill products, silver ware, cotton and woollen goods, carriages, harnesses and leather belting, furniture, wooden ware, pianos and clothing; the Boston & Maine Railroad has a large repair shop in the city, and there are valuable granite quarries in the vicinity.