of mid winter the caisson thority,that the scientific world will have been sunk as low as necessary. regard the fact as established, The caisson for the new York side is about one third done, that auroras depend upon, or and will be placed in position as soon as possible after com- are, in some… … body, the ether, possesses elas- the caisson. It not unfrequently happens that these boulders ticity and inertia, but not grav- project some distance beyond the external edge of the shoe, ity. (See “ Brande’s Encye., Art. “ Light.”) opening, C, in its lower part. A movable damper, D, turns and…
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