The Waltham watch and the Singer sewing-machine had their beginning in Boston in 1850.
The plaits are sewed partly by hand and in a special sewing-machine, and the hats or bonnets are finished by stiffening with gelatin size and blocking into shape with the aid of heat and powerful pressure, according to the dictates of fashion.
In addition to cash registers, the city's manufactured products include agricultural implements, clay-working machinery, cotton-seed and linseed oil machinery, filters, turbines, railway cars (the large Barney-Smith car works employed 1800 men in 1905), carriages and wagons, sewingmachines (the Davis Sewing Machine Co.), automobiles, clothing, flour, malt liquors, paper, furniture, tobacco and soap. The total value of the manufactured product, under the "factory system," was $31,015,293 in 1900 and $39,596,773 in 1905.
Here, too, are a plant (covering more than Boo acres) of the Standard Oil Company and a large establishment for the manufacture of the "Singer" sewing machine - according to the U.S. census the largest manufactory of sewing machines in the world - employing more than 6000 workmen in 1905; among the other manufactures of Elizabeth are foundry and machine shop products (value in 1905, $3,887,139), wire, oil (value in 1905, $2,387,656), refined and smelted copper, the output of railway repair shops, edge tools and lager beer.
First we analyze the motion of the twine of a sewing machine.