ho doubt the extent of the field: “Tf the law of these aberrations in audibility can be evolved, and some method discovered for their correction, as the variations of the compass are corrected, then sound may be depended upon as a ble to the very ship it was meant to reach. Naturally, more definite… … The mariner should, when approaching the sound from windward, go aloft, and when approaching from the leeward, the nearer he can get to the surface of the water, the sooner he will hear the sound. A mari-
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