| Description | Enclosing (b) below. Docketed “Sir J. Louther. Coal engine by revolver. "Summarised “Watt’s last motion (S & P) Boulton’s favourite. With Sir James Louther. Have killed robins with fixable air. James and Matthew are making a model of Savery’s engine. I have given them Henderson’s water wheel model and they are trying it on the Duck Pond. Boulton’s sketch [within the text & enclosed] of the application of a sun and planet motion for coal winding engines, with his remarks.” |