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Scientific American, Vol. 50, No. 1 (January 1884) (1884)

leaf 1

An illustration from Scientific American, Vol. 50, No. 1 (January 1884), 1884, leaf 1
rge balcony, once every two minutes. direction ttf Geu. J. C. Duane, Engineer Third Lighthouse The weight operating this clockwork descends through the District. center column of the tower. A short distance below the water level a good foundation » < » ) ^ Theory of lilfe. of gravel was found, upon… … thinly and evenly with a badger hair brush. A second coat- ip?;^ projecting part being supported by brackets, as shown in ing must be applied when the first has dried. When both the drawing. On top of the watch-room is a fixed light are dry, apply over the whole surface two or three coatings of the…

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