Fig. 5
[Ca/H] and [Ti/H] vs. log N(H i). In case of Ti ii the solid line represents the linear fit of the sample A systems, which in this case are all class 1 systems, too. In case of Ca ii the solid line represents the linear fit of all systems with known N(Ca ii). Systems with solar Ca/H or Ti/H ratios would lay on the horizontal solid line with [X/H] = 0.
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