But we all know what machine tools are doing now,--and where should we be without them ?" Watt withdrew from the firm in 1800, on the expiry of his patent for the condensing steam-engine; but Boulton continued until the year 1809, when he died full of years and honours.

Watt lived on until 1819.

The last part of his life was the happiest.

During the time that he was in the throes of his invention, he was very miserable, weighed down with dyspepsia and sick headaches.

But after his patent had expired, he was able to retire with a moderate fortune, and began to enjoy life.
Before, he had "cursed his inventions," now he could bless them.