Note 151 — Chapter IV · PART I. THE AQUEDUCTS. (continued 2)

The new company for bringing these springs into Rome again, under the name of the Aqua Marcia-Pia, has been obliged to make compensation to the town of Tivoli for the possible injury to the manufactories established there, which depend upon the force of the water, although the damage was in a great degree imaginary. This new aqueduct brings the water of the Marcia only. The water is nearly of the same quality as that of the Claudia, and is still found as cool as it was in the time of the early Empire, notwithstanding that it is brought into Rome in metal pipes for the last ten miles. A number of shops for the sale of this cool water have been opened in different parts of Rome. Nature never changes, and the same qualities of particular springs which prevailed two thousand years ago, prevail still. It is said by persons who have witnessed the experiment tried, that in the hot summer weather of Italy, when the thermometer of Fahrenheit stands above 100, the contrast between the heat of the air and the coldness of the water is so great that if a glass tumbler is suddenly put into the water near its source, the glass will break in the same manner as a glass tumbler will break in England if boiling water is poured into it in frosty weather.