latent heat of ice

Put equal quantities of crushed ice into two identical filter funnels P and Q (see Fig. 14.5). If the ice has been taken out. of a freezer, it must be left until it attains a temperature of 0 °C and starts to melt. Place an immersion heater connected to an ammeter, voltmeter and rheostat in P, making sure that it is completely covered with ice. At the same time as you switch on the immersion heater, place dry empty beakers of known mass under P and Q. Note the readings of the ammeter and voltmeter, and if necessary adjust the rheostat to keep them constant throughout the experiment. After several minutes, when a reasonable amount of water is in the beaker under P, note the time, remove the beakers and switch off the heater. Find the masses of the beakers and their content.