Egypt, too, produces another tree of a peculiar description, the Persian849 tree, similar in appearance to the pear-tree, but retaining its leaves during the winter. This tree produces without intermission, for if the fruit is pulled to-day, fresh fruit will make its appearance to-morrow: the time for ripening is while the Etesian850 winds prevail. The fruit of this tree is more oblong than a pear, but is enclosed in a shell and a rind of a grassy colour, like the almond; but what is found within, instead of being a nut as in the almond, is a plum, differing from the almond851 in being shorter and quite soft. This fruit, although particularly inviting for its luscious sweetness, is productive of no injurious effects. The wood, for its goodness, solidity, and blackness, is in no respect inferior to that of the lotus: people have been in the habit of making statues of it. The wood of the tree which we have mentioned as the “balanus,”852 although very durable, is not so highly esteemed as this, as it is knotted and twisted in the greater part: hence it is only employed for the purposes of ship-building.