This is a vintage-style illustration depicting a chemical reaction. A tall, conical beaker or flask is centrally positioned, filled with a mixture that appears to be iron and nitric acid. The mixture is bubbling vigorously, producing a cloud of white smoke or fumes that rise from the top of the beaker. The beaker is resting on a circular base. The illustration is contained within an oval frame, and the background is filled with fine, vertical lines, creating a textured effect. Below the image, there's a caption that reads 'Fig. 312. - Iron and nitric acid.' The style of the illustration suggests it's from an older scientific textbook or publication.