length and extends about 300 feet. The masonry has now been completed radio-micrometer, bolometer, or thermopile. In July, to slightly above the level of the new bed, the amount to within 200 feet on the north side of the valley, where 1898, Nichols was invited to test his instrument at the it… … was carried by cars and deflection of 0 60 mm. Fig. 4.—-Excavation, 130 Feet Deep, for the Dam Foundation. dumped above and be- Vega gave a mean de- NEW CROTON DAM—NEW YORK CITY WATER SUPPLY. THE low the dam in the em- flection of 027 mm. Al- bankments which will though the quantitative be noticed…
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