Illustration of a grinding mill, or gharat, from the Simla District in India which is worked by water power.

Photograph of 'Plats on the grounds of the Montana Station, showing what may be accomplished by the flume' in the late 19th or early 20th century.

Photograph of a water mill being powered by water from a waterfall for irrigation in the late 19th or early 20th century.

Photograph of a small waterfall in Feyoum, Egypt that is was used for power and irrigation in the late 19th and early 20th century.

Photograph of two men standing next to a water lift on the shore of the Rio Grande in the early 20th century.