National Geographic : 1946 Mar
© National Geographic Society Kodachrome by Maynard Owen Williams Chopped Straw from Primitive Threshing Floors Is Bundled AshoreatOld Cairo Along the sloping bank felucca masts mark a port for Africa's largest city. From low to high, the Nile formerlyrose 16feet, registered onthe near-by Nilometer. Officials could thus estimate the amount of Nile mud deposited on delta lands and assess corresponding taxes. Now irrigation systems reduce the seasonal variation.