title: Errata for Volume 123.
abstract: In the article "Pronuclear fusion as affected by x-rays and by postirradiation anaerobiosis," by C. S. Bachofer, in the issue of 27 Jan., page 139, the last sentence in column 1 should begin "The term (1/4)-fused is used to designate ...," not "The sum (1/4)-fused . . ." as printed. In the article "Magnetic techniques for in vitro isolation of leucocytes," by Sumner Levine, in the issue of 3 Feb., page 186, the equation should read micro radicaln(n+2)=4.90 Bohr magnetons, instead of as printed with the square root sign covering the last part of the equation.