Editing James Watt (section)

===Soho Foundry===
At first, the partnership made the drawings and specifications for the engines, and supervised the work to erect them on the customers' property. They produced almost none of the parts themselves. Watt did most of his work at his home in Harper's Hill in Birmingham, while Boulton worked at the [[Soho Manufactory]]. Gradually, the partners began to actually manufacture more and more of the parts, and by 1795, they purchased a property about a mile away from the Soho Manufactory, on the banks of the [[BCN Main Line|Birmingham Canal]], to establish a new foundry for the manufacture of the engines. The [[Soho Foundry]] formally opened in 1796 at a time when Watt's sons, Gregory and James Jr. were heavily involved in the management of the enterprise. In 1800, the year of Watt's retirement, the firm made a total of 41 engines.<ref>Roll, p. 280.</ref>