| Description | 'With a small parcel.' On the outer page of the letter have been written various names. [He has been making calculations for Wheal Virgin mine. Mr Keir's secret of dissolving silver from copper. Steam will dissolve white lead, linseed oil and water. Steam can dissolve iron, copper and brass. Mr Keir's new yellow brass, which he is making bolts of, for the navy. Watt has given in a petition for a patent the copying scheme, and has taken Matthew Boulton and Mr Keir as partners. He describes how the business will work]. (Partners no. 57) |