A precis is given of the principal Acts dealing with electricity supply and the use of water power; in particular, the Electric Power Boards Act, which has been the authority under which much of the rural reticulation has been carried out, is reviewed. An analysis is given of the various types of authorities controlling the supply.Maps illustrate the extent to which the country has been reticulated, and the location and size of the principal generating stations are indicated.The capital expenditure involved reaches over 32 million £. Graphs allocate the cost between the Government and the various supply authorities and show how the system has resulted in decreasing costs per unit sold.The average annual consumption per consumer for all purposes is 1 970 units, and the average price is 1.28d., whilst for ordinary domestic purposes the consumption is 1 067 units per annum and the average price 1.143d.The figures given are averages compiled from statistics for the year ended 31st March, 1933.