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The most precise measurements are done at present by timing of radiopulsarsin binary systems with two neutron stars. The timing measurements of theTaylor-Hulse pulsar B1913+16 gave the most precise results on testing ofgeneral relativity (GR), finding implicit proof of existence of gravitationalwaves. We show that available results of existing measurements, obtained to theyear 1993, in combination with the results of the Mariner 10 in (1992), givethe boundaries for the variation of the gravitational constant ${\dot G}/{G}$inside the limits $(-0.6 \div +2)\cdot 10^{-12}$ year{$^{-1}$}.Comment: Submitted to Journa

CHECKING THE VARIABILITY OF THE GRAVITATIONAL CONSTANT WITH BINARY PULSARS