National Geographic : 1935 Sep
BLISTERING SUNSHINE SPEEDS UP SEAWATER EVAPORATION IN THE STEAMING MASSAUA SALT WORKS Salt water, seen entering by canal at the picture's lower edge, flows into evaporating "pans," or basins, formed bydikes. When theponds arefull, flood gates are closed and evaporation proceeds. Heaps of new-made salt rise in the background. Only a small section of Massaua's vast saltworks iscomprised inthis picture.