Unpublished letter, regarding stone mouldings and building materials from Edwd [Edward] Anderson to unknown recipient Anderson writes about experiments he carried out on making stone mouldings using a joiners' plain [plane], reducing the number of men required to carry out the work. He also describes experiments he undertook to determine the cementation and magnetic quality of building materials. Anderson also reports that he had presented methods of creating stone mouldings to the Royal Society by invitation of Joseph Ames nearly forty years previously. Minor additions appear in ink throughout. Subject: Engineering / Trade Read to the Royal Society on 6 June 1788. 5 June 1788