This is a vintage illustration depicting a diving bell submerged in water. The bell is a large, cylindrical structure with two oval windows labeled 'a'. It's suspended in the water by several ropes attached to weights labeled 'b' and 'B' at the bottom. An air-tube labeled 'c' connects the top of the bell to what appears to be a boat labeled 'e' above the water's surface. The water level inside the bell is indicated by a line labeled 'd'. A person is visible inside the bell, seemingly observing the underwater environment. Several fish and patches of seaweed are illustrated around the bell, along with rocks on the seabed. The style of the illustration is reminiscent of a technical drawing or an old scientific diagram.