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The evaporation caused by the blazing sun of these tropics made the water a deeper blue than in cooler latitudes, as in the Arctic and Antarctic oceans the greens are almost as vivid as the blues about the line. I watched the thousand flying-fishes' fast leaps through the air, and caught gleams of the swift bonitos whose pursuit made birds of their little brothers.

In two rivers equally large, that of which the falls have least height may sometimes present the greatest dangers and the most impetuous movements. It is probable that the river Orinoco loses part of its waters in the cataracts, not only by increased evaporation, caused by the dispersion of minute drops in the atmosphere, but still more by filtrations into the subterraneous cavities.

During the short period of universal enthusiasm for reform the great officials had used incautiously some of the vague liberal phrases then in fashion, but they never seriously intended to confer on the child which they were bringing into the world a share in the general government of the country; and the rapid evaporation of their sentimental liberalism, which began as soon as they undertook practical reforms, made them less and less conciliatory.

He seems to think that no definite qualities can attach to bodies which are in a state of transition or evaporation; he also makes the subtle observation that smells must be denser than air, though thinner than water, because when there is an obstruction to the breathing, air can penetrate, but not smell.

But whether the water so used is to be returned to the boilers or not it should never contain an excessive amount of lime or solid matter, as a certain amount of evaporation is continually going on in the glands which will result in the deposit of scale and require frequent taking apart for cleaning.

The current sometimes flows up and sometimes down, according to the height of water in the Congo, but it is obvious that the general direction must be down, as many small streams flow into the Lake, and all their water is certainly not dispersed by evaporation.

Half the pools had vanished by drainings and evaporation; the mud had begun to crack, and, in some places to pulverize; while the upper margin of the old pond had become sufficiently firm to permit the oxen to walk over it, without miring.

A loose mass floated in the middle of our path; one could sometimes get on along this while it bent and heaved under the weight, but through it he would plunge and find great difficulty to get out: the water under this was very cold from evaporation; it took an hour and a half to cross it. It is called Chiséra, and winds away to the west to fall into the Kalongosi and Moero.

And then at last we reached our level, a region on the upper margin of the cloud floor, where evaporation reduced the temperature, that had recently been that of greenhouse warmth, to intense cold. That evaporation was going on around us on a gigantic scale was made very manifest. The surface of the vast cloud floor below us was in a perfect turmoil, like that of a troubled sea.

Now such joints are supposed to be analogous to the partings which separate volcanic and Plutonic rocks into cuboidal and prismatic masses. On a small scale we see clay and starch when dry split into similar shapes; this is often caused by simple contraction, whether the shrinking be due to the evaporation of water, or to a change of temperature.