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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)  16:05, 22 June 2011 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.
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