Chlorinating water at a desert reservoir, 1916 (c)

Photograph, World War One, Mesopotamia (1914-1918), 1916 (c).

A clean water supply was vital for the troops operating in Mesopotamia (now Iraq). Here Major Dras of the Indian Medical Service and a colleague treat drinking water in a desert reservoir at Sannaiyat.

From album of 103 official photographs compiled by Colonel A H McCleverty, 2nd Queen Victoria's Own Rajput Light Infantry.