55.3 MB (8.0 MB compressed)
5886 x 3283 pixels
49.8 x 27.7 cm ⏐ 19.6 x 10.9 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Weir and river measurements. 19th-century artwork of a thin-wall weir being used to measure aspects of the flow of water along a river. This is a rectangular weir, and the amount of water flowing over the weir is directly related to the water depth labelled 'h' here. This method, using temporary or permanent weirs, can be used to measure and compare water flows across a range of streams and rivers. Artwork from the first volume (1897) of 'La Revue Scientifique et Industrielle' by French chemist and inventor Jules-Louis Breton (1872-1940).
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