Abstract
THE United States Geological Survey, among its other activities, renders an important service to hydrological science by collecting and publishing information on the amounts of developed and potential water-power throughout the world, the returns of the former and the estimates of the latter, of course, requiring periodical revision as the development of water-power proceeds. From the latest statement issued by the Survey, it is to be gathered that the total amount of horse-power actually harnessed at the end of 1934 was 55 millions, as compared with 46 millions in 1930, 33 millions in 1926, 29 millions in 1923, and 23 millions in 1920 an increase of nearly 140 per cent in fourteen years.
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Cunningham, B. Water-Power Developments in the United States. Nature 139, 738–740 (1937). https://doi.org/10.1038/139738a0
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DOI: https://doi.org/10.1038/139738a0