Errata for the article by I. J. Good In this paper X and Y are supposed to have the same spin old new p125, table 3.54 plus/minus 0.033 3.54 plus/minus 0.33 p137, line -11 -48 as a -48. Note the occurrence of -48 as a p155, middle n.c.s.d. -k_0 n.c.s.d.-k_0 p158, 3 up possible possibly