ABSTRACT
The history of the firm of Boulton & Watt is interesting for another reason. From 1775 to 1800 they possessed a monopoly of steam-engine construction, 337 and, therefore, their output comprises practically all the engines that were erected in Great Britain before the year 1800. The records of the firm contain the dates, power, and owners of all engines erected, therefore it is comparatively easy to discover which trades employed steam-power, and to what extent.
