by this method compared with other plans which The problem presented to the United States engi- for operating an electric-light plant for working at have been employed upon the Mississippi, show that it neers by the Mississippi River has been one of the night and for several other auxiliary… … about one-half the cost of suction excavator employed the first equipment, with anywhere on inland waters, the understanding ‘that and for several years had should the Carnegie Institu- the greatest capacity of any tion decide to establish a of the Mississippi suction solar observatory of _ its…
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