Eye of Horus fractions were written as the sum of two or more unit fractions (a fraction with 1 as the numerator), with scribes possessing tables of answers (see Rhind Mathematical Papyrus 2/n table). Thus instead of , one would write + . Different parts of the Eye of Horus were thought to be used by the ancient Egyptians to represent one divided by the first six powers of two: The Rhind Mathematical Papyrus contains tables of "Horus Eye Fractions". Studies from the 1970s to this day in Egyptian mathematics have clearly shown this theory was fallacious and Jim Ritter definitely showed it
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,