This section is from the book "A Library Of Wonders And Curiosities Found In Nature And Art, Science And Literature", by I. Platt. Also available from Amazon: A library of wonders and curiosities.
The following account of the Whirlwinds of Egypt, is from Belzoni's Narrative: - "A strong wind which arose this day leads me to mention some particulars of the phenomena that often happen in Egypt. The first I shall notice is the whirlwinds, which occur all the year round, but especially at the time of the camseen wind, which begins in April, and lasts fifty days. Hence the name of camseen, which in Arabic signifies fifty. It generally blows from the south-west, and lasts four, five, or six days without varying, so very strong that it raises the sands to a great height, forming a general cloud, so thick that it is impossible to keep the eyes open, if not under cover. It is troublesome, even to the Arabs; it forces the sand into the houses through every cranny, and fills every thing with it. The caravans cannot proceed in the deserts; the boats cannot continue their voyages; and travellers are obliged to eat sand, in spite of their teeth. The whole is like a chaos. Often a quantity of sand and small stones gradually ascends to a great height, and forms a column of sixty or seventy feet in diameter, and so thick, that were it steady on one spot, it would appear a solid mass. This not only revolves within its own circumference, but runs in a circular direction over a great space of ground, sometimes maintaining itself in motion for half an hour, and wherever it falls it accumulates a small hill of sand. God help the poor traveller who is caught under it!"
 
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