`  Here is the edit (last week) in which explanatory text, helping readers know how to use the Volcano vaporizer, was deleted, allegedly in order to ``simplify caption``:  (cur | prev)  Mjpresson (talk | contribs) (10,780 bytes) (→Vaporization: simplify caption) (undo) http://en.wikipedia.org/w/index.php?title=Cannabis_smoking&diff;=435657539&oldid;=435657363  Because unlike the other vaporizer picture, complete with ``whip`` drawtube, etc., the Volcano picture conveys no idea of how the device is used, I propose that the following text be reinserted:   After filling with vapors, the balloon (top) is ready to remove and inhale from.   `