Chemistry Apparatus Cartoon: The Boiling Tube

I realise that my series of Chemistry Apparatus Cartoons has a large number of tubes in it.  But, to be fair, chemistry is full of tubes.  This is the last one in my series - I have two more non-tubes to follow.  After the measuring cylinder, I thought it was time to go back to the tubes:  here he is - the boiling tube.

Next time?  I only have two more in the series (unless inspiration hits me again), but we're not scraping the bottom of the barrel yet!

So far, the series of Chemistry cartoons has included The Test Tube, The Side-Arm Test Tube, The Delivery Tube, the beaker and The Measuring Cylinder.  I do have a 'formal' Chemistry background (I completed a Natural Sciences degree at Cambridge University) and have also written some more serious articles on Chemistry, including how I transferred from Chemistry to a career in online web analytics.