Frequently a single pipe is led to the tap, but the water in this branch cools and must therefore be drawn off before hot water can be obtained.
The North Atlantic being altogether cut off from the Arctic regions, and the vertical circulation being active, this movement is here practically non-existent; but in the South Atlantic, where communication with the Southern Ocean is perfectly open, Antarctic water can be traced to the equator and even beyond.
In 1903 a beginning was made in the cultivation of cotton in the dry river beds, where water can always be obtained at a depth of 10 ft.
Provided the ship is designed to float upright at the smallest draft with no load on board, the stability at any other draft of water can be arranged by the stowage of the weight, high or low.
When wet it becomes sticky and almost impossible to move or work with farm implements; neither air nor water can penetrate freely.
