Behavior of the dust-to-gas ratio, ρd/ρH, normalized to the average Galactic value, 0.01, with the E(B − V)/NH ratio in units of 1.7 × 10-22 cm2 mag (Bohlin et al. 1978); symbols are as in the previous figure. The dashed line shows the relation for type C curves (Eq. (4)) and the continuous line for all the anomalous curves analyzed (Eq. (5)).
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