Indication of water level in reservoirs
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P.
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Article
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1879
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Elsevier Science
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English
β 58 KB
New Plan for l~lliug Gas Meters. [Jour. Frank. Inst., Vesuvian ][lailways.---Concessions have been granted to two viva! companies for constructing railways to the summit of Vesuvius, "and it is expected that both mutes will be rapidly pushed to .completion. In many places the sleepers will be suppor