The incomplete measure has a duple -- two notes take up the space of three normal eighth notes (quavers).
Now, the first full measure: Each dotted quarter (= "dotted crotchet"?) gives us the equivalent of three eighth notes. Also, the three eighth notes at the beginning of the bar give us three eighth notes. The left hand plays low notes (D♭ and A♭, where the A♭ is tied over from the previous bar); next, the right hand plays F and A♭; and then the left hand changes clef and plays F and A♭. That's three eighth notes. The high F and A♭ (dotted quarter) should have been drawn a little bit more to the right, maybe, to line up nicely with the dotted half in the left hand, since one dotted half = two dotted quarters.
The last measure on that line: the rhythm in this bar is similar to the previous. We have three eighth notes, and then a dotted half note.