51. Add Ch 58557 Reference (shelfmark): Add Ch 58557 Title: Scope & Content: Patents: To Lord Dundonald, for disengaging a mineral or fossil alkali, 1794, with specification: 1795. Archibald Cochrane, 9th Earl of Dundonald: Patent to, for disengaging a mineral or fossil alkali: 1794, 1795. Collection Area: Western Manuscripts Languages: English Date Range: 1794-1795 Extent: 1 item