Scroll to info

An apparatus for obtaining fresh water, Antofagasta. Halftone.

We’re improving the information on this page. Find out more.

Lettering

The balloon as spy, and the sun as water-sweetener. Obtaining fresh water in a nitrate country: a use for the sun in a rainless land. The oquete Nitrate Company, Antofagasta, Chili, which has its works in a rainless country where the sun shines continually, uses an ingenious apparatus for turning the brackish water of the region into sweet water. It consists of a series of frames containing twenty thousand square feet of glass. The panes of glass are arranged in the shape of a V, and under each pane is a shallow pan containing brackish water. The heat of the sun condenses the water upon the sloping glass, and this fresh water then runs down into a little channel, and is carried away into the main canal. Nine hundred and fifty gallons of fresh water can be collected daily.



    Download

    Credit: Wellcome Collection

    Free to use with attribution

    CC BY

    Share

    Back to top