vessel had cast anchor in the Rhone, opposite the city, to take some loading ; but when the commander wanted to sail again he could not raise the anchor. This fact attracted much attention, and many people went to witness the singu- lar circumstance. The Captain, unwilling to lose his anchor, sent down a man, to find what was the matter. The diver reported that the anchor was hooked under something round, but he could not tell what it was. A capstan was applied to raise it, which succeeded. It brought up a leaden conduit pipe from the bottom of the Rhone, which crossed it from the City of Aries, towards Trinquetaillade, over a breadth of about 90 toises (576 feet) in a depth of 6 or 7 toises (about 40 feet,) the deepest part of the Rhone. I saw some pieces of this conduit of lead, 5 or 6 inches in diameter, about 4 lines (one third of an inch) thick, in joints of 1 toise each soldered lengthwise, and covered by a strip or sheet of lead of the same thickness covering the first solder about 2 inches. The conduit was soldered at the joints, 6 feet apart, by the same material, which made a swell at that distance. On each joint were these words in relief C. CANTIUS POIHINUS. F. which was apparently the name of the maker or architect, who laid down the conduit pipe in the time of the Romans. I delayed 7 26 not to inform Mr. Begon, at Rochefort, of this discovery, because he had always favoured my project of conducting water along the bottom and across the Charente, which would not have been half so difficult as it had no doubt been, to lay one across the Rhone where this was found. Hence it may be believed, as I think now myself, that many things supposed now-a-days to be new and never to have been previously invented, may have been thought of long before, even in remote ages." Pp. 129, 130. Ancient Aqueduct of Metz. This Aqueduct was built by the Romans when that city was under their dominion ; but it is difficult to fix upon the precise era of its construction. It is said in the history of the city of Metz that the Roman legions built roads in the year 70 ; but there is reason to suppose that the construc- tion of this Aqueduct, as well as that of other important structures built by the Romans at Metz, belongs to a time more remote, and that the date of the reign of the first em- perors may be the era when the legions of Caesar occupied the country of the Gauls. The total length of the Aqueduct was 14 miles, and the fall for this distance was about 73 feet. The channel-way was 6i feet high, by 3 feet wide, con- structed with stone masonry and having an arch over the top : the interior face of the walls and the bottom was 27 covered with a coat of plastering ; 3 inches thick in the bot- tom, and 2 inches on the sides. From remains of this Aqueduct which are now found at various points along its course, it appears to have required many expensive struc- tures for crossing valleys ; in one instance the Aqueduct bridge was 3,600 feet long, and the greatest height was 100 feet. In constructing the Aqueduct over these bridges, they formed it in two channels separated by a wall, and each covered with an arch ; thus they insured a supply of water across the bridge by one channel in case the other required repairs. Aqueduct of B our gas, near Constantinople. Three Aqueducts exist in the valley of Bourgas, 8 miles from Constantinople, for conducting water into the city. One of them is remarkable for the beautiful architectural arrangement and the solidity of its construction. It is 115 feet high, and was built under the Emperor Justinian, A. D. 527. It has two ranges of arches, one above the other, and the Aqueduct supported upon the second. These Aqueducts are in some parts unlike those of Rome, which were formed on a continuous line for many miles, with a regular inclina- tion from the source to the city, but are interrupted by re- versed syphons. Instead of crossing deep and wide valleys in the usual manner of stone structures, the Aqueduct termi- nates on one bank in a reservoir or cistern, and a pipe is laid from it down the sloping side of the hill to a stone pier erected at a suitable distance ; the pipe rises up the pier to the top where the water is discharged into a small cistern 28 nearly as high as that in