Scientific American. 169 MARCH 14, 1806. | eable of large size in two nearly parallel lengths from Sandy Hook point to the channel; the new method, one small cable only. The size of the direct current eables was 15 inches, that of the new single cable 75 of aninch. The original system provided six… … WMA ar and its necessity may be appreciated, a general map of The entrance was therefore practically closed at night the new system ten lights; by the former the channel New York Harbor (Fig. 1) is given and referred to for to deep draught vessels. It was particularly necessary was lighted 4,000…
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