Again, I had to get Google to translate the best page I could find on it.
Remember I noted that Cremieu was a center of grain trade. In La Halle are the original stone measures of grain. The way they worked is they would plug the hole with wood and fill the basin with grain level with the top. The buyer's container would be placed at the foot of the basin and the plug removed. The unit of measure was "bichet."
Scroll to the East and you'll see La Halle's relationship to Tour de l'Horloge.
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