Abstract: Apparatus for managing a lottery distribution includes a plurality of lottery cards carrying a unique machine-readable code readable by a Point of Sale (POS) system for purchase and activation of the lottery card by a customer. Each lottery card carries in customer readable format only part of the game data, which is covered by a scratch-off, necessary for a determination by the customer whether the lottery card is allocated to be either a winner of a predetermined prize or a non-winner of the lottery and the lottery control system is arranged to communicate to the POS system the remaining information for said determination to be printed on a POS receipt for the customer so that the customer can read the printed data on the receipt along side or through the card to determine whether the card is a winner.

Abstract: Pulses of direct current are applied to the ground by means of a pair of electrodes or by means of a coil. These pulses produce an alternating current magnetic field if they are in the vicinity of a zone of mineralization. These secondary currents are measured both during and after the duration of the pulses thus enabling the zone to be deliniated readily and easily. The quality, quantity and geometry of the mineralized zone may be ascertained by analysing the characteristics of the secondary, alternating current magnetic field.