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Updated: May 9, 2025
It seems natural that Guatimala should one day join the isthmuses of Veragua and Panama to the isthmus of Costa Rica; and that Quito should connect New Grenada with Peru, as La Paz, Charcas and Potosi link Peru with Buenos-Ayres.
Cutting of Isthmuses Canal of Suez Maritime Canals in Greece Canals to Dead Sea Canals to Libyan Desert Maritime Canals in Europe Cape Cod Canal Changes in Caspian Diversion of the Nile Diversion of the Rhine Improvements in North American Hydrography Soil below Rock Covering Rock with Earth Desert Valleys Effects of Mining Duponchel's Plans of Improvement Action of Man on the Weather Resistance to Great Natural Forces Incidental Effects of Human Action Nothing small in Nature.
It will see that instead of cutting one another's throats about theological questions, we have surveyed lines of railway, laid telegraphs, constructed steam-engines, launched ships, pierced isthmuses, created sciences, corrected laws, repressed factions, fed the poor, civilized barbarians, drained marshes, cultivated waste lands, without ever having a single dispute as to the infallibility of a man.
During the past year the Navy has, in addition to its regular service, supplied the men and officers for the vessels of the Coast Survey, and has completed the surveys authorized by Congress of the isthmuses of Darien and Tehuantepec, and, under like authority, has sent out an expedition, completely furnished and equipped, to explore the unknown ocean of the north.
It is difficult to find there what, in scene-shifters' language, are termed practicables. Man has no hospitality to hope for from the ocean; from the rock no more than from the wave. The sea is provident for the bird and the fish alone. Isthmuses are especially naked and rugged; the wave, which wears and mines them on either side, reduces them to the simplest form.
The tempest came, and in good earnest, but without any of the disastrous consequences which had attended that of the previous year. It blew fearfully, and the water was driven into all the sounds, creeks, channels and bays of the group, bringing many of the islands, isthmuses, peninsulas, and plains of rock, what the seamen call 'awash, though no material portion was actually overflowed.
The substances washed down by rain-waters form by their accumulation new bars, isthmuses of deposited earth, and points of division that did not before exist.
He points out that whereas sailors have not circumnavigated the globe, that they had not been prevented from doing so by any continent, and it seems to him altogether unlikely that the Atlantic Ocean is divided into two seas by narrow isthmuses so placed as to prevent circumnavigation. "How much more probable that it is confluent and uninterrupted.
The effect of a change in the current produced by such new channels as we have described as forming across the isthmuses of bends is to perturb the course of the stream in all its subsequent downward length. Thus an oxbow cut-off formed near the junction of the Ohio and Mississippi may tend more or less to alter the swings of the Mississippi all the way to the Gulf of Mexico.
During the past year the Navy has, in addition to its regular service, supplied the men and officers for the vessels of the Coast Survey, and has completed the surveys authorized by Congress of the isthmuses of Darien and Tehuantepec, and, under like authority, has sent out an expedition, completely furnished and equipped, to explore the unknown ocean of the north.
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