National Geographic : 1918 Jul
THE NATIONAL: GEOGRAPHIC MAGAZINE © Paul Thompson WOMEN POLICE PARADING DOWN FIFTH AVENUE: NEW YORK CITY New York's police department faces a tremendous task. The city, because of its great size, the indifference of its citizens to the comings and goings of their neighbors, and the opportunities afforded for having a good time suited to every taste, attracts alike the criminal and those on pleasure bent from everywhere. The war has made a heavy draft on New York's conservators of law and order, but women are proving that they can patrol a beat or collect fares in a street car as well as men. Thus does the economic emancipation of woman receive another boost. Between these two reservoirs four kinds of construction were used. Over approximately level ground, the cut-and cover method was used-a great trench was dug and in it was built a horseshoe shaped conduit of concrete. Where hills interposed, instead of going around them, grade tunnels were built through them. When valleys, creeks, and rivers came in the way, there were three courses open: great masonry aqueducts like those of ancient Rome could be built; steel pipe-lines could be laid on the floor of the valleys; inverted siphons or pressure tun nels could be dug far below the surface through solid rock.