| Description | Calculations & deductions made from three experiments upon the old & new engines at Chelsea. Experiments on the old engine next the road, 15 May 1778; the old engine next the river, 24 May 1778; the new engine erected by Boulton & Watt, 6 Jul. 1779.
Docketed “Calculations and Certificate of experiment… engines of… Copy sent to Mr… Sep. 3 1779.” |