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Updated: May 18, 2025
An experienced sailor has told me that nothing is more difficult to diagnose than the presence of icebergs, and a strong confirmation of this is found in the official sailing directions issued by the Hydrographic Department of the British Admiralty. "No reliance can be placed on any warning being conveyed to the mariner, by a fall in temperature, either of sea or air, of approaching ice.
M. de Bougainville was also, whenever possible, without such delays as would prejudice the main object of the expedition, to take hydrographic surveys, and to collect information upon the commerce, productions, and means of exchange, of the countries visited. Two vessels were placed under the orders of M. de Bougainville.
And it is to be remembered as a very probable thing that the flowing of this melted snow is the cause which determines principally the hydrographic state of the planet and the variations that are periodically observed in its aspect. Something similar would be seen upon the earth if one of our poles came to be located suddenly in the center of Asia or of Africa.
I confess that we had greatly enjoyed the adventure qua adventure. Mysterious fjords which wound out of sight into the fastnesses of unknown mountains, and which were entirely uncharted, fairly shouted an invitation to enter and discover what was round the next corner. Islands by the hundred, hitherto never placed on any map, challenged one's hydrographic skill.
There is a hydrographic office attached to the bureau of navigation, which prepares maps, charts and nautical books relating to navigation, and makes investigations concerning marine meteorology. This Department has charge of the Naval Observatory for which a new set of buildings is now being built at Washington.
At present the name of Maranon has remained at the same time to the river of the Amazons, and to a province much farther eastward, the capital of which is Maranhao, or St. These hydrographic reveries have for the most part disappeared; but the lakes Cassipa and Dorado have been long simultaneously preserved on our maps.
Thereafter the engineer might be seen from time to time dashing up the hatchway to take an observation, then back to the chart-table, where he examined first this chart, then that one. Some of the charts were new, just from the hands of the hydrographic bureau. These belonged to the craft. Others were soiled and torn; patched here and there, or reinforced by cloth from a discarded shirt.
"Hi, Dad! We just got back. Any news?" "Yes, son. We have the computer results," Mr. Swift replied. "Got a pencil handy?" Tom copied down the latitude and longitude figures as his father dictated. "According to the latest hydrographic maps, based on IGY findings," Mr. Swift went on, "this area is a high plateau of the Atlantic Ridge it's near the St. Paul Rocks." "What about the depth?"
The question is, then, how they came to be peopled with inhabitants differing both from those on land and those in the sea, and how does it come that every hydrographic basin has its own inhabitants more or less different from those of any other basin? Take the Ganges, the Nile, and the Amazons. There is not a living being in the one alike to any one in the others, etc.
Almost due south of the Ilha do Boi is the Zunga chya Kampenzi, whence our word chimpanzee: in the hydrographic chart it is miswritten Zoonga Campendi, and in Tuckey's map, which contradicts his text, "Zoonga Casaquoisa." His "Zoonga Kampenzey," also named "Halcyon Island," appears to be the Draper's Island or the "Monkey Island" of Mr.
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