Gibbosité Centrale de L'Etna, 183Gibbosité )is no longer used but translates as prominence, protruberence, protrusion, extrusion, bump). View from ESE. Folded engraving of very high quality, 33x47cm (13"x18.5") and below it a line drawing with feature names. Slight browning at edges. In good condition. Together with more distant views from SE and south, equally good engravings but with spotting on the image area, and articSur la structure et sur l'origine du Mont Etna, pp175-216 and 575-630Annales des Mines. Map missing from otherwise complete article.