The nights, on the other hand, are so sharp, that it is necessary to be more careful in guarding against the effects of cold in this country, than in the northern parts of Europe during the severest winter, for the consequences frequently prove fatal. During the whole year, day and night are equally divided, or with but imperceptible variation, and, as in all tropical climates, there is no twilight; for with sunset night begins. During the dry season, everything in nature appears desolate and dismal; the plants are burnt up; the trees lose their leaves, and appear like brooms; no bird is heard to sing; no animal delights to disport in the gladness of its existence; every living being creeps towards the forest to secrete itself, seeking shelter from the fearful heat; save that, now and then, an ostrich will be seen traversing the desert fields in flying pace, or a giraffe hastening from one oasis to another. In this season, however, frightful hurricanes occasionally arise, and fill the minds of those, who have not been witness of such a phenomenon in nature before, with the utmost consternation. A powerful current of air, of suffocating heat, blows fiercely from one point of the heavens to the other, devastating everything that lies in its course. The atmosphere bears at these times generally a leaden grey appearance, and is impregnated with fine sand: the sun loses its brilliancy, and total darkness envelopes the earth, rendering it even difficult to distinguish objects at a few paces distant. The sky changes suddenly, becomes of a yellow colour, then assumes a reddish hue, and the sun appears as a blood-red disk. The wind howls, tears up everything within its reach; houses, fences, and trees by the roots, carrying them away with it; levels mounds of sand, and piles up fresh hills. In short, the devastation caused by a hurricane of this kind is beyond description. Unfortunate, indeed, is he who happens to be overtaken in the desert by one of these storms. There is no course left for him to save himself, but to throw himself with his face on the ground, in order to avoid suffocation by the pressure of the atmosphere. Respiration is totally impeded; all the fibres are tightly contracted; the chest threatens to burst for want of pure air; and a man of rather weak constitution, overtaken by one of these hurricanes in the open air, generally succumbs. But robust men, even those in full vigour of life, feel depressed in every limb for several hours after exposure to these storms, and recover but slowly, and by degrees. Animals fly and endeavour to conceal themselves; every creature, in fact, seeks a place of shelter. The camels on journeys indicate the storm before it breaks forth by an unsteadiness of gait, and by drooping their heads towards the ground.