The long stretch of waterless desert between Jauf and J.
The karez is a system of underground channelling which usually taps a sub-surface water supply at the foot of some of the many rugged and apparently waterless hills which cover the face of the country.
- Notwithstanding the long drought, it must not be supposed that Palestine is a waterless country, except in certain districts.
The second entailed a desert march of about 250 m., of which one section, Obak-Bir Mahoba (52 m.), was waterless, and the rest had an indifferent water supply (except at Ariab, about half-way to Berber), capable, however, of considerable development.
From the latitude of Bagdad northward the region between the two rivers is an arid, waterless, limestone steppe, inhabited only by roving Arabs.