Three walls were covered with digital maps, the fourth with a blank projection screen.
In 1897 the ship " Washington " obtained depths of 2220 fathoms in the middle of the eastern Mediterranean; and the Austrian expeditions in the " Pola " discovered in the " Pola Deep " (35° 44' N., 21 45' E.), south-west of Cape Matapan, a maximum depth of 2046 fathoms. Between these two deep areas a ridge runs in a north-westerly direction 550 fathoms from the surface - possibly a projection from the African plateau.
Rotation of the box round CC is prevented by downward pressure of the spring Z on a projection attached to the side of the box.
The Gulf of Carpentaria, situated in the north, is enclosed on the east by the projection of Cape York, and on the west by Arnheim Land, and forms the principal bay on the whole coast, measuring about 6° of long.
The Coal Measures become narrower in the south, until, owing to the eastward projection of the highlands, the Lower Palaeozoic rocks reach the coast.