_Oil_ of several kinds plentifully produced in Syria, 18, 19.
The bad consequence of eating too plentifully of it, 141.
_Ophthalmia_ very common at Aleppo, and why, 137.
A particular kind of it described, 222.
_Opium_ not so generally used by the Turks as is reported, 83.
Different methods of using it, 83, 84.
Its effects, 84.
_Orontes_, the most considerable river in Syria, described, 11.
_Ounce_, a wild beast, found on the mountains of Syria, 61.