Key points are not available for this paper at this time.
Einstein recently published (1) some calculations concerning a suggestion made by R. W. Mandl, namely, that a star B may act as a "gravitational lens" for light coming from another star A which lies closely enough on the line of sight behind B. As Einstein remarks the chance to observe this effect for stars is extremely small.
F. Zwicky (Mon,) studied this question.
Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context: