Comparison of the interstellar X-ray extinction calculated here with that of J. Wilms et al. (2000). For clarity, the X-ray extinction has been multiplied by ﹩{\left(E/{\rm{keV}}\right)}^{3}﹩. The inset shows a comparison between the unmultiplied quantities. Clearly, the interstellar X-ray extinction derived here significantly exceeds that of J. Wilms et al. (2000) at E ≳ 0.5 keV.