the Institute of Technology, Ho- the one neutralizes that from the other, and the the mariner. When he can see a danger he has a boken, N. J., invented an instrument to determine sound is obliterated. chance to avoid it, but in a fog all he knows posi- “Accordingly, in determining the direction of… … sound not tuned in unison with it. the late Prof. Elisha Gray’s method of ring- —_—_—— OOo A Tunnel to the Isle of Wight. TO SHOW TURNING GEAR ing bells under water have been pressed into service. T'he Hamilton-Foster fog-signal, The bringing of the Isle of Wight, off the The following is the…
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