| Description | Docketed “Experiments with James Watt’s 70 horse engines. Nov. 1821, no girdling – 10 miles per hour. Apr. 1822, with girdling – 8.7 miles per hour. May 1828, with girdling, 60 horse – 9.3 miles per hour. Jul. 1828, no girdling – 9.5 miles per hour. Observation, copper supposed defective, paddles wanted deepening. Indicator figures will be sent. Mr. Knight’s estimate given at £1670. Enquiry about West India Dock pumps. Men at work West India Dock, engines retarded by building. Coals 15 bushels per hour – James Watt.” |