Copper daggers with parallel ribbing (61) down the middle are common in the XIth-XIVth Dynasties; and in the XVIIIth-XXth Dynasties they are often shown in scenes and on figures.
150, and then ribbing extended to all the forms. The ware is generally rather rough, thick and brown for the amphorae, thin and red for smaller vessels.
Ribbing (1816-1899), C. Y.
Of these, Nyblaeus compiled a lucid account of Swedish philosophy from the beginning of the 18th century up to and including Bostrom; Ribbing (Platos Ideelara and Socratische Studien) showed how closely Swedish idealism is allied to Greek.
In his theology of nature he describes a schematic wing as consisting of a rigid ribbing in front, and a flexible sail behind.