The conduit was soldered at the joints, six feet apart, by the same material, which made a swell at that distance. On each joint were these words in relief, C. CAINTIUS POI HINUS. P., apparently the name of the maker, or of the architect who laid down .the pipes in the time of the Romans. My project of laying pipes along the bottom of the Charente, would not have been half so difficult, PS it had no doubt been to lay them across the Rhone, where this was found. Hence it may be believed, as I now think myself that many things supposed to be new, and now for the first time invented, may have been thought of long before, even in remote ages. Traite de la Construction des Ckemins, p. p. 129-30.

PRELIMINARY ESSAY. 63

consisting of stories, each of which is occupied by a separate family, with a stone stairway in common ; but such arrangement and power of the Glasgow works that is the

abundance of water is distributed into every story. A considerable quantity is also supplied to fountains, or hydrants, on the side-walks, and in the alleys, or closes.

The Cranston Hill Works, made many and costly experiments, as to the best mode of filtering the water, which they, too, drew from the Clyde, and eventually so impaired the capital of the company, that in 1834 they were fain to sell out to the Glasgow Company. The experience thus dearly purchased, was, however, productive of benefit to the community, for the water now supplied, about 3,500,000 gallons daily, is thoroughly filtered.