Ammon
2 of the 7 encyclopedias on this shelf carry an entry for Ammon. Both are reproduced below, so you can see where they agree and where they differ.
Collier's New Encyclopedia (1921)
a god of the ancient Egyptians, worshipped especially in Thebes (No-Ammon), and early represented as a ram with downward branching horns, the symbols of power; as a man with a ram's head; and as a complete man with two high feathers on his head, bearded, sitting on a throne, and holding in his right hand the scepter of the gods, in his left the handled cross, the symbol of divine life. Ammon, his wife Mut (the mother), and his son Chensu, form the divine triad of Thebes. In Egyptian mythology he held his highest place. From about the time of the 21st dynasty, he came to be considered the god of oracles, and as such was worshipped in Ethiopia and in the Libyan desert. Twelve days' journey W. of Memphis, in the desert, was a green oasis fringed with a belt of palm trees, on which rose the temple of Ammon. Hither came pilgrims laden with costly presents; among them Alexander the Great and Cato of Utica. Alexander was hailed as the actual son of the god by the priests, quick to anticipate the wishes of the hero. The Persian conqueror, Cambyses, sent against the temple an expedition, which perished miserably in the sands. The worship of Ammon spread at an early period to Greece, and afterward to Rome, where he was identified with Zeus and Jupiter.
Aiton's Encyclopedia (1910)
an Egyptian deity whose worship extended through many parts of North Africa and Greece, but centered at the Egyptian city of Thebes. Ammon was represented in Egyptian art usually as a person with the head and horns of a ram. He was the protector of cattle and shepherds. The reader may recall that Alexander the Great toiled through the Libyan Desert to the famous oracle of Jupiter Ammon in an oasis. He is said to have been gratified by a declaration of the priests to the effect that he was a son of Jupiter. 2026 Editor's Note: Amun (the article's Ammon) rose to become king of the Egyptian gods, and his temple complex at Karnak grew into the largest religious building ever raised by human hands — still standing at Luxor, its forest of giant columns among Egypt's greatest sights. (Ed: BR 2026-06-01)