At the time I took the photo of the cylinder it was to relate to the line Cylinders containing such mixtures must be clearly marked with that depth so that we had at least one image on the page It s probably not so important now so it could go although it is the only diving related image on there However I ve noticed that GA s FA s often have a top right image I was considering trying the pulmonary oxygen toxicity in a rat lung pic there but wasn t sure how it would look with the Toxicology and poison box going underneath it Maybe they could both go top in which case we could keep the cylinder In the Quick suggestions section on the talk page suggested one image per section what do you think