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.
The independent system of motors is generally adopted, because it is found more economical and better for driving purposes, besides dispensing with the overhead shafting and belting, always unsightly, and dangerous to the workpeople.
The rim is slightly wider than the belt, and is of such a section as will suffice to resist the stress due to the pull of the belt, which is commonly taken as 80 lb per inch of width for single belting and 140 lb per inch of width for double belting.
The principal manufactures are slaughtering and meat-packing products, foundry and machine-shop products, rubber boots and shoes, rubber belting and hose, printing and publishing products, carpentering, pianos and organs, confectionery and furniture.