Egyptian fraction have been called "Horus-Eye fractions" after a theory (now discredited) that they were based on the parts of the Eye of Horus symbol. They were used in the Middle Kingdom in conjunction with the later notation for Egyptian fractions to subdivide a hekat, the primary ancient Egyptian volume measure for grain, bread, and other small quantities of volume, as described in the Akhmim Wooden Tablet. If any remainder was left after expressing a quantity in Eye of Horus fractions of a hekat, the remainder was written using the usual Egyptian fraction notation as multiples of a "ro", a unit equal
Horus swift grey throat patch and a brown rump. The form "toulsoni" of northwestern Angola and Zimbabwe is a dark morph of nominate "A. h. horus", with a dark rump and small throat patch. Both dark forms have sometimes been split as separate species. Horus, whose name this bird commemorates, was the ancient Egyptian god of the sun, son of Osiris and Isis. Horus swift The Horus swift ("Apus horus") is a small bird in the swift family. It breeds in sub-Saharan Africa. It has an extensive continuous distribution from eastern and southern South Africa north to southern Zambia and central Mozambique,