Page 987, left column, second paragraph, in the last sentence, xD1 = 0.6472 is considered true (instead of xD1 = 0.6742).

Page 987, left column, fourth paragraph, in the third sentence, 0.3016> x2> 0.2238 is considered true (instead of 0.3061 < x2 <0.2238).

Page 987, left column, fourth paragraph, in the fourth sentence, x2 = 0.3016 is considered true (instead of x2 = 0.2238)