THE WATER SUPPLY OF NEW YORK CITY.

The Dam in, next to the Great Pyramid* of Egypt, the largest masonry structure in the world. It impounds

32,000,000,000 gallons of water.

BY

ON June 21, 1907, on the side of one of many mountains soon to lx» perforated by a mammoth aqueduct, Mr. M'Clennan, Mayor of X<« York, cut the first sod of perhaps the greatest municipal engineering work ever undertaken.

The enterprise in question is the third of a series, all designed, within the comparatively short period of seventy years, with a single object—that of furnishing New York with a reliable and, in the estimation of its population, sufficient water supply.