I know that Einstein General relativity show the space time curvature caused by the matter. But I never see Einstein refer the space time curvature by use this diagram ( the trampolin and bowling )diagram. In many of his paper in GR I see he refer the space time curvature by the variation of the coordinate system like in his book for normal people newbielink:http://en.wikisource.org/wiki/Relativity:_The_Special_and_General_Theory/Part_II

[nonactive] He used the variation of the coordinate to explained his idea. Does this diagram was first used by the contemporary physics because I never see that Einstein used this diagram.