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The Faraulep, Ulie, Ifuluk, and Euripeg Islands were successively examined, and on the 27th April the explorer started for the Bonin Islands, where he learnt that his exploration of that group had been anticipated by Beechey. He, therefore, took no hydrographical surveys. Two of the crew of a whaling-vessel, which had been shipwrecked on the coast, were still living at Bonin Sima.
The details which Pigafetta and Martin Transylvain have given with regard to the topographical and hydrographical dispositions of this strait are rather vague, and as we shall have to mention it again when we speak of De Bougainville's expedition, we shall not dilate upon it now.
Intelligent persons have judged that by reducing the naval forces to two frigates, two schooners, and about a dozen gunboats, the essential wants of the colony would be duly answered, in ordinary times; and some of the vessels might then be destined to pursue hydrographical labors in the Archipelago, which, unfortunately, are in a most backward state, whilst others could be sent on their periodical cruises against the Moros.
The hydrographical survey of this group, contained within a circumference of at least thirty leagues, was executed by M. Blois from the 24th to the 27th June. The islands are for the most part high, terminating in volcanic peaks; but some are of opinion, judging from the arrangement of the lagoon, that they are of madreporic formation.
He was the author of a book, now very scarce, The World's Hydrographical Description, and he also wrote a work on practical navigation, The Seaman's Secrets, which had great repute. Poet, b. at Mallow, ed. at Trinity Coll., Dublin, and called to the Irish Bar 1838. He was one of the founders of The Nation newspaper, and of the Young Ireland party.
But granting that loam presenting the same aspect has originated at different times and in distinct hydrographical basins, it is nevertheless true that during the glacial period the Alps were a great centre of dispersion, not only of erratics, as we have seen in the last chapter, and of gravel which was carried farther than the erratics, but also of very fine mud which was transported to still greater distances and in greater volume down the principal river-courses between the mountains and the sea.
To form an accurate idea of these hydrographical relations, it must be borne in mind that a division into three chains takes place in the colossal group or knot of the mountains of Pasco and Huanuco.
Nicholas Bay, called by Bougainville the Baie des Français, where the explorers passed New Year's Day, 1838, is a much pleasanter looking spot than Port Galant. The usual hydrographical surveys were there brought to a satisfactory issue by the officers under the direction of Dumoulin.
Spirit-writing one has heard of, but not even the Psychical Research Society has recorded the case of a dead man copying hydrographical charts.
In 1794, the Spanish corvette Atrevida went with the determination of ascertaining their precise situation, and, in a paper published by the Royal Hydrographical Society of Madrid in the year 1809, the following language is used respecting this expedition: "The corvette Atrevida practised, in their immediate vicinity, from the twenty-first to the twenty-seventh of January, all the necessary observations, and measured by chronometers the difference of longitude between these islands and the port of Soledad in the Manillas.
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