| Description | 2 sheets. On the same sheet: Transcript of letter. John Turner (Bersham) to Boulton & Watt. 1 Aug. 1781. Transcript of letter. Hugh Jones (Chester) to Boulton & Watt. 1 Aug. 1781. Docketed "Return from Derbyshire and sundry other subjects." Summarised "Gregory engine too expensive. Boulton proves their error. Yatestoop engine to be erected 1000 fathoms underground. Arkwright loses the day, his revenge. Boulton says he had no right to patent, for he had seen such mills 40 years prior to Arkwright’s use of them. Shadwell piston rod breaks. Engines wanted. Experiments upon the expansive principle at Soho. Lengthy correspondence concerning Hornblower. |