State some methods by which you can improve your hydrometer

Some methods to improve your hydrometer are as follows -:
1) cleanliness- The hydrometer, hydrometer jar and the liquid in which the readings are taken should be cleaned properly. 
2) Temperature- The hydrometer and liquid should be the same temperature of the surrounding atmosphere. This will prevent changes in density during the testing
3) Proper immersion-  A hydrometer jar should have an inside diameter of approximately 1 inch (25mm) greater than the outside diameter of the hydrometer.

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