Typed on slide:
'Nullarbor Plain
"Nulla (no) and "Arbor" (tree) meaning no tree. A most appropriate name given to the Nullarbor Plain by early explorers.
It is not strictly true as there are a few depressions called "dongas" were [sic] a few stunted trees grow.
Across this vast plain speeds the train on its 300 miles straight run, the longest in the world. In pre train days it had no habitation, has no permanent stream of water, its porous limestone nature is dotted with blow holes and caves, while a bluish scrub is its chief vegetation.'