Maximum NG accelerations, F_NG,perih, as a function of perihelion distance for all 45 near-parabolic comets with determinable NG effects. Three samples A1, A2 and B are shown by red, magenta and turquoise symbols, respectively. The dotted curves represent the 10^-5, 10^-4 and 10^-3 of the solar gravitational acceleration F_⊙, respectively. NG parameters taken for preparation of this plot are in Part II of this catalogue (Table A.4).