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said above all a trumpet to this the capt made no reply The objection made by the capt to the trumpet was the difficulty in locating the sound. There may be something in this on account of the varying intensity in deviating from the axis of the instrument
make exp
Professor Caswells experience on board the English steamer 
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[[page number in pencil]] 73
Though the whistle was continually sounded the ship could not be found by the pilots.
The whistles on the Locomotives are a great nuisance in the upper part of the city of New York The trumpet could be substituted.
[[image - hand-drawn in ink - a curved trumpet]]
Ear trumpet in the pilot houses The mixture of kerosene and common oil separates when freezing