Nilometer on Elephantine Island, Egypt. Two graduated measuring markers are seen, one below the feet of the woman at centre left, and one in the niche at centre right. This Nilometer consists of a series of such markers, set in stairs leading down to the water's edge. Here, some of the steps are submerged. Several such measuring stations were built in Egypt over the centuries to measure the rise and fall of the Nile. These measurements were vital for planning the farming that depended on the annual flood. This photograph was obtained in around the period from 1900 to 1920 by the American Colony Photo Department of Jerusalem.
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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