Temperatures, gas densities and masses, and common pressure obtained from the superposition of two hot plasma bubbles (mekal models, see Sect. 4.2), 80 pc in diameter, towards each of the areas sampled in Fig. 9. Blue circles (left scale) and black crosses (right scale) mark the hotter and colder media, respectively. The lower right plot gives the mean N_H column density we used for absorption in each area.