Victorian illustration to download showing a picture of an artesian well, constructed in 1841. From a barn-like structure rises a scaffolding tower. A pipe runs up the centre of it, and at the top water gushes into a large vessel. On the ground are heaps of timber with which to finish building the tower. An artesian well is a well drilled into an artesian aquifer, ie one confined between impermeable rocks, which causes positive pressure so that the water rises.