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    "source_title": "Encyclopaedia Britannica (1911)",
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    "verified_text": "l1200, accepted the two-thirds share in watt's patent held by him in satisfaction of the debt. three years later boulton and watt formally entered into partnership, and it was mainly through the energy and self-sacrifice of the former, who devoted all the capital he possessed or could borrow to the enterprise, that the steam-engine was at length made a commercial success. it was also owing to boulton that in 1775 an act of parliament was obtained extending the term of watt's 1769 patent to 1799. in 1800 the two partners retired from the business, which they handed over to their sons, matthew robinson boulton and james watt junior. in 1788 boulton turned his attention to coining machinery, and erected at soho a complete plant with which he struck coins for the sierra leone and east india companies and for russia, and in 1797 produced a new copper coinage for great britain. in 1797 he took out a patent in connexion with raising water on the principle of the hydraulic ram. he died at birmingham on the 18th of august 1809.",
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