Figure 9. Sands sounder invented by Commander Benjamin F. Sands, USN, while on duty with the U. S. Coast Survey in 1857. Compression of the spring actuated levers, which separated the symmetric halves of the weight which then fell to the bottom. A valve was actuated creating a void which allowed sediment to enter the tube. Pulling up the line reset the valve capturing the bottom sample
Photo Category: Oceanography - Historical instruments
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Added On | 18th October 2015 |
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