English: Simple Vigreux column/air condenser, chemical laboratory scale. Near identical to Wikimedia Commons image file Vigreux_column.svg

Well constructed, accurate earlier image of a research laboratory-scale Vigreux column (a type of air condenser) from User YassineMrabet, originally a vector image created in Inkscape, was edited to remove a faux label/brand that appeared on the female ground glass joint (at the top of the earlier version). This visual "blemish" is irrelevant to the meaning of the image, and removing it simplifies its explanation wherever it appears in articles. Hence, this image should simply be considered a "touched-up" version of the important earlier effort of User:YassineMrabet.

File created from near identical, same-sized image, by simple "clean-up" ("blemish" removal, see above) in GraphicConverter9, with no other attempt to change image content or quality. Le Prof