The midpoint of his scientific activity was the theory of electrical prospecting in geophysics.

Electrical prospecting with alternating current.

Mixing circuit for electrical prospecting.

Method of electrical prospecting.

Electrical prospecting.

The technique evolved from techniques of electrical prospecting that predate digital computers, where layers or anomalies were sought rather than images.

In 1927 he joined the Geological Institute of Romania, where he began his studies in electrical prospecting, which was to remain his lifelong preoccupation.

Another problem originating in electrical prospecting and to which he devoted for a long time his mathematical abilities was the determination of the magnetic field lines for various configurations of currents.