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![Figure 54 ship4429.jpg Figure 54](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4429.jpg?itok=xzQcDvWU)
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Figure 54. Pellet burette - this instrument was produced by the French chemistHenri Pellet. It uses the same principle as that of the Richter or Schmidtburette. It has an automatic zero level, in which the reactive reservoir is pressurized by a rubber bulb. (Image credit: Oceanographic Museum of Monaco | Y. Berard)