  The discrepancy between two recently reported experimental values of the
gravitational constant G was analysed within a differential version of MOND
theory. In contrast to the most commonly accepted interpretation of MOND
theory, it is assumed that only the relative gravitational acceleration between
a test mass and an array of source masses determines the magnitude of post
Newtonian corrections at small magnitudes of acceleration. The analysis was
applied to one of the most recent Cavendish-type gravitational force
experiments, which showed a significant deviation of the measured gravitational
constant from the current CODATA value. A remarkable agreement between the
observed G discrepancy and galaxy rotation curves was revealed by a consistent
extrapolation within the framework of this model. The differential approach
suggests that gravity-induced alterations of the space-time-curvature may
define the magnitude of corrections to Newton's law.
