Aubin is the centre of important coal-mines worked in the middle ages, and also has iron-mines, the product of which supplies iron works close to the town.
About 1828 he built the Canton Iron Works in Baltimore, Maryland, the foundation of his great fortune.
Lime-kilns and the manufacture of cement, and smelting and iron works are carried on in the environs.
Most of the British iron works lie in and near the important coal-fields in Scotland between the mouth of the Clyde and the Forth, in Cleveland and Durham, in Cumberland and Lancashire, in south Yorkshire, Derbyshire, and Lincolnshire, in Staffordshire and Northamptonshire, and in south Wales in spite of its lack of ore.
Woollen and linen goods are manufactured, and there are ribbon looms and tanneries in the town, and large iron works in the neighbourhood.
There are large iron works (including foundries and factories for engines, boilers, chains and cables), shipbuilding yards, glass manufactories, chemical, soap and candle works, brick and tile works, breweries and tanneries.
Engineering and iron works (as at Bowling and Low Moor) are extensive; and the freestone of the neighbourhood is largely quarried, and in Bradford itself its use is general for building.
In 1767 the Colebrookdale Iron Works cast a batch of iron rails or plates, each 3 ft.