Composite neutron VDOS of low-hydrogen-content glassy carbon. The IN4 data on the Lannin sample (red diamonds) are from Kamitakahara et al. (1992). The BT4-FANS data (solid circles) on the APS plate samples were measured in this work and are scaled to match the IN4 data in the region between 60 and 90 meV. Error bars on the FANS data are ± one standard deviation of the mean. Horizontal bars represent instrumental energy resolution. Graphite measured by others (Rols et al., 2000) on BT4-FANS (blue squares) is shown for comparison.