ClipArt ETC
Two cases of springs: "In one, the water descends through the porous bed e to the layer d, which is relatively impervious. The water flows along this layer until it comes to the surface, and there the water flows out as a spring, s'. In the other, the water moves underground through the porous layer b, under pressure, until it reaches a crack which leads up to the surface...s." -Salisbury, 1919

Springs

Two cases of springs: "In one, the water descends through the porous bed e to the layer d, which is…