. Our firemen. A history of the New York fire departments, volunteer and paid ... 650 engravings; 350 biographies. . ssure, will bereduced in size and more heavily lined with masonry. It includes the sectionunder the Harlem River, which, owing to the character of the rock, is carriedone hundred and sixty feet below the tide level; and the tunnel here, in addi-tion to the heavy brick lining, will also be secured by an interior lining of castiron two inches in thickness, the section of the tunnel below the river being tenand one-half feet in diameter. On the south side of the Harlem River the tu
. Our firemen. A history of the New York fire departments, volunteer and paid ... 650 engravings; 350 biographies. . ssure, will bereduced in size and more heavily lined with masonry. It includes the sectionunder the Harlem River, which, owing to the character of the rock, is carriedone hundred and sixty feet below the tide level; and the tunnel here, in addi-tion to the heavy brick lining, will also be secured by an interior lining of castiron two inches in thickness, the section of the tunnel below the river being tenand one-half feet in diameter. On the south side of the Harlem River the tun-nel will resume its dimensions of twelve feet three inches, and terminate in agate house at One Hundred and Thirty-fifth Street. Thence iron pipes willconvey the water to Central Park reservoir. The entire length of the tunnel to One Hundred and Thirty-fifth Street will bethirty and three-quarter miles, being over five miles less than the old aqueduct OUR FIREMEN. Htween trie sumo points. It will hi worked through thirty-four snafts andon open portals, and the progress may he estimated as thirty-two feet for-. Frnm IIabpers Wfeklt. WATER SHED OF CROTON RIVER. ard per w eek at each heading. There are about twenty miles of tunnel atesent excavated, and about three miles of brick lining construction of this Aqueduct will cost from fifteen to twenty millionollars. The contract for excavation amounted to over twelve million dollars. 322 OUR FIR E M E N. Not less than six extensive gate chambers will be required for the purpose ofemptying* portions of the Aqueduct, if it should be found necessary, and forregulating the flow of water from the Storage Reservoir into the city; one ofthese, near the Croton Dam, is a most intricate structure, calculated to meetthe wants of a most unprecedented water serv ice, and will alone cost some fivehundred thousand dollars. Surveys had been made for shallow receptacles, but no sites for dams foriover one hundred square miles of the b
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