  In consequence of long-term (2000) observation of a system of two
high-precision quartz gravimeters (one of them with an attached magnet) placed
in a special (at a depth of $\sim $10m) gravimetric laboratory on a common base
separated from the foundation of the building, signals of a new nature were
detected. They were of a smooth peak-type shape, several minutes duration, and
with amplitudes often more than that of the moon tide. The nature of the
signals cannot be explained in the framework of traditional physical views but
can be qualitatively described with the aid of a supposed new interaction
connected with the hypothesis about the existence of the cosmological vectorial
potential A_g, a new presumed fundamental vectorial constant.
