Figure AF1. Magnetic moments measured by the x- and y-SQUID sensors for an approximately axial dipole standard aligned parallel to the z-SQUID sensor. A. Results for rotation of the standard about the magnetometer z-axis with the standard sample in approximately the center of the measurement region (position used for discrete sample measurements). Note that the mean of the x-component is significantly offset toward –x. B. Corresponding results when standard is positioned in the bottom of the sample tray (to simulate measurement of archive halves). In this position, the x-component is significantly offset toward +x.