The anomalous behaviour of water can be studied with Hope's apparatus.In Hope's apparatus, a flat bowl is attached to a cylindrical container.There is provision to attach thermometers above and below the flat bowl on the cylindrical container.Water is filled in the mixture of ice and SALT is put in the flat bowl.Initially both temperature T1 and T2 are identical but as TIME passes, temperature T1 of water in the lower part of the cylinder decreases fast while temperature T2 of water in the upper part of the cylinder decreases comparatively SLOWLY.However, once the temperature T1 of the lower part reaches 4°C, it remains ALMOST stable at the temperature.T2 decreases slowly to 4°C.Thereafter, since T2 starts changing rapidly, it records 0°C first and after that the lower temperature T1 records 0°C temperature.The point of intersection of the TWO curves shows the temperature of maximum density.The behaviour of water between it's temperature from 0°C to 4°C is called anomalous behaviour of water.