Litchfield, Isaac W, Massachusetts Institute of Technology. Society of Arts · Boston, Mass. : The Society · leaf 79
63 Science Conspectus it is necessary to admit or to discharge object is only about 1.5, which is found to give to the observer the same impres- water. Main tanks of great capacity must therefore be fitted, provided with sion as when using the naked eye. By large sea-valves and powerful pumps.… … Midship Section, Laurenti type for incidental disturbing causes, such as surpassed clearness and distinction is variation in the specific gravity of the sea-water or consumption of stores. obtained. Mechanical power is employed for handling the tube, enabling it to be Smaller tanks near the ends of…
Science
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