Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 1 - By Alexander Von Humboldt And Aime Bonpland.
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Yet, According To M. Cordier, The
Fine Pebbles Of Suez Owe Their Origin To A Breccia Formation, Or
Siliceous Agglomerate.
At the moment of our setting sail, on the 19th of November, at
noon, I took some altitudes of the moon, to determine the longitude
of the Morro.
The difference of meridian between Cumana and the
town of Barcelona, where I made a great number of astronomical
observations in 1800, is 34 minutes 48 seconds. I found the dip of
the needle 42.20 degrees: the intensity of the forces was equal to
224 oscillations.
From the Morro of Barcelona to Cape Codera, the land becomes low,
as it recedes southward; and the soundings extend to the distance
of three miles. Beyond this we find the bottom at forty-five or
fifty fathoms. The temperature of the sea at its surface was 25.9
degrees; but when we were passing through the narrow channel which
separates the two Piritu Islands, in three fathoms water, the
thermometer was only 24.5 degrees. The difference would perhaps be
greater, if the current, which runs rapidly westward, stirred up
deeper water; and if, in a pass of such small width, the land did
not contribute to raise the temperature of the sea. The Piritu
Islands resemble those shoals which become visible when the tide
falls. They do not rise more than eight or nine inches above the
mean height of the sea. Their surface is smooth, and covered with
grass. We might have thought we were gazing on some of our own
northern meadows.
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