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 Soundings 
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Location: Cambridgeshire, England
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In Admiral Hercules Robinson's Sea Drift I came across mention of "Ogden's patent machine":

" ... the soundings at noon, sixty-six fathoms; mealy sand....that were taken by Ogden's patent machine, an admirable contrivance; a tube of glass twenty inches long, graduated like an apothecary's measure, with a hole at the top which admits the water; the water rises by hydraulic pressure, according as the instrument descends. The tube is enclosed in an iron case, with a small spiral spring at the bottom of the case to prevent the glass tube being broken by the concussion against the ground. A little cavity at the bottom of the iron case receives the arming as in a common lead, and the depth is read off the index marked along the glass tube...."

....."sand and broken shell......"
:lol:

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Fri Aug 11, 2006 10:26 am
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The Times, September 28th, 1803:

" .... All day on Friday last one of his Majesty's 74 gun ships was taking soundings and making observations in Seaford Bay, and off the mouth of Newhaven Bay, and off the mouth of Newhaven harbour. At seven o'clock on Saturday she sailed for the Westward. ....."






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Tue Oct 13, 2009 10:52 am
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