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Figure 1

Figure 1. A drilled roller (round boulder) used as a sounding weight. Figure 2 . Ordinary sounding lead weight, sometimes attaining many kilograms. The lead dates from the Christian era. The trapezoidal form with a recess for tallow and acquiring bottom samples dates from a few centuries back. In this form, millio ns of sounding were made. Fig. 3. French sounding lead used in many expeditions.

Photo Category: Oceanography - Historical instruments

Author: Y. Berard/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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Added On
18th October 2015
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