Abstract: A golf ball has a plurality of dimples in its spherical outer surface and its spherical outer surface is divided into the faces of an icosahedron consisting of 20 regular spherical triangles, and the golf ball's spherical outer surface is further divided by great circle paths which obtained by extending spherical straight lines connecting the midpoint of each side of the sperical triangles of icosahedron to its opposite apex, then large spherical pentagons will be created on the polar regions of the golf ball's spherical outer surface. The center of large pentagon as a pole, which is a common apex of 5 regular spherical triangles of the spherical icosahedron, from the pole, spherical straight lines extend along the both sides of each of the 5 spherical triangles to the equator. (Same thing happens on the opposite pole.) The spherical outer surface is further divided by the spherical straight lines into small sections to arrange the dimples.

Abstract: A solid golf ball with core and cover covering the said core, except outer cover, made in compositions of a mixture of .alpha.,.beta.-ethylenical unsaturated carboxylic acid and fatty acid bismuth salt in amounts of 3-25 and 5-50 parts by weight respectively per 100 parts by weight of the base resins of the said golf ball, which has a good spin property by a softness and the carry can be extended in comparison with other golf balls made in a common composition. Since it can be applied selectively to each part, it is possible to make the golf balls with various properties that may give a satisfaction to all sorts of golfers.