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Old June 5th, 2019, 10:36 AM
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Default Sap hydrometer reading.

Just wondering about how the hydrometer works. We test for sugar by floating a hydrometer in the sap, and the more dissolved sugar there is, the more dense the sap is, and therefore the hydrometer floats higher in the sap. So the question is, aren't the other dissolved minerals creating additional density? If so, how much does the mineral content contribute to the density and how variable is the mineral content. Is it possible to have high mineral content and have the actual sugar content be lower than the test indicated?

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