I'm tired, but else I am fine. It took us quite a while to understand what we see in the exercise to now more and more find out that I should have searched a little bit better before trying to understand it by myself. :D
However, the exercise is not as easy as it is suggested by the current manual and that is rather distracting.
However ... at least we found during the last month that the "newly" bought conductivity electrodes are not precise enough. :'D
The Periodic Table
The Periodic Table