Thomson, Thomas Half-length portrait of Thomas Thomson seated in carved wooden high-backed chair and turned slightly to the left as viewed. Table in the background, left hand side as viewed, with chemistry apparatus and book. Engraved after a painting by John Graham-Gilbert (1794-1866). Inscribed: ‘J.G. Gilbert. C.Cook. Thomas Thomson, M.D., F.R.S., LATE PROFESSOR OF CHEMISTRY AT THE UNIVERSITY OF GLASGOW. WILLIAM MACKENZIE, GLASGOW, EDINBURGH, LONDON & NEW YORK’. c.1840