Hopes Apparatus

To show that water has a maximum density at 4 degrees Celsius..
Consists of a sheet metal cylinder with two tubes in the upper and lower regions for inserting thermometers through rubber stoppers. Mounted on a base and encircled midway by an outer trough for holding a mixture of ice and salt. Temperature of the water is measured at the top and bottom of the inner cylindrical vessel over a period as the water-cools.

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