An apparatus for studies of wire explosions in air at atmospheric as well as reduced pressures is described. A theoretical treatment of the discharge circuit is presented. In this treatment the external resistance and inductance as well as the wire inductance (all as functions of time) have been taken into consideration. It is then possible to calculate the wire variables --current, resistance, resistive voltage drop, effect, and energy input --as functions of time from the dl/dt-waveform experimentally obtained. Wire variables of Ni-and W-wires exploded both in air and vacuum are presented as well as a discussion of these.

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