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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
end being lifted for the entrance of the vessel, and restored again to form a dam to preserve the upper level. Movable gates to restrain the water on the higher level and admit the passage of boats were introduced in the navigation of the Tesino and Adda to Milan. Cresy dates the invention of canal-locks to 1188, when Pitentino restored the Mincio to its ancient channel to the Po, from whence it had been diverted by the Romans in the time of Quintus Curtius Hostilius. The canal of Languedoc, which unites the Garonne with the Mediterranean, passes across the narrow portion of France north of the Pyrenees, and is 150 miles in length. It unites the Atlantic and Mediterranean, and was constructed by Andreossy, an Italian engineer, in the reign of Louis XIV. The fall from the summit at Naurouse to Cette, on the Mediterranean, is 621 feet 6 inches. The fall from the summit to the Garonne is 198 feet. There are 74 locks on the eastern portion, 26 locks on the Atlantic section, wh
Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
rnante Renaissance style of the period. It was commenced under the reign of Henry II., in 1584, and finished in that of Henry IV., in 1610. The architect was Louis Le Foix. The commercial city of Bordeaux is situated upon the river 70 miles from its mouth, and at the time the lighthouse was built it had another special value, as it was a part of the projected chain of watercourses connecting the Bay of Biscay with the Mediterranean. This was effected shortly afterward by the canal of Languedoc, which is 150 miles in length, and unites the Garonne with the Mediterranean. The island rock on which the tower is built is dry only at low water, at which time a surface of 1,500 x 3,000 feet of rock is exposed. Upon this the circular base of the tower is founded, being 135 feet in diameter, and built up solid, except a cistern for fresh water and an opening for the stairs, which commences at high-water mark. The opening is closed by heavy doors, and is reached by a fixed ladder fro