'Figures de l'examen theorique du nouveau systeme de charpente' [a new structural system] Product:Canvas Left to right David Herd

Left to right David Herd

and beneath is a view in the tunnel

pictured in his flat in Leicester

View of the residence of Queen Caroline in Portman Street

L-R Dave Greenfield

'Figures de l'examen theorique du nouveau systeme de charpente' [a new structural system] Product:Canvas Left to right David HerdPlate 6 from the paper "De la structure des vaisseaux Anglais, consideree dans ses derniers perfectionnements" by Charles Dupin, Philosophical Transactions of the Royal Society, vol. 107 (1817), pp. 86 135. Figure 3 has been corrected, a new version overlaying the original an attached by sealing wax. Original: ink on paper. 1816