**18. The difference in gravity between equator and pole**


Finally the summation of gravity value difference indicated that the pole gravity is more at poles than the equator by about +5.17 gal. According to the following equation The gravity at poles = + 3.39 + 6.63–4.85 = + 5.17 gal (The excess in gravity value at the pole relative to the equator) (63).
