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Show AUSTRALIA'S DIP PIPE LINO. Tubas Will ll Laid on Top tho Ground and II o 32ft Miles Long. From the Philadelphia Record: When mention Is made of the pipe lines of tho eastern United States, which rango from six to eight Inches In diameter, diam-eter, some ot them being over 1,000 miles long, tho credulity of tho listener Is severely tested; but remarkable as these lines are, tho one about to be constructed In west Australia Is stilt moro wonderful, both In point ot magnitude mag-nitude and engineering difficulties to be surmounted. This line, which runs to Coolgardle, witl be 2tC miles In length, of steel riveted pipe thirty-ono Inches In diameter, and varying In thickness from throe-sixteenths to flvo-slxteenths. flvo-slxteenths. Desldcs this there will be olghty-two miles ot weidod pipe, from twenty-six to twenty-nine Inches In diameter and one-quarter Inch In thickness. thick-ness. Tho project has for Its object tho delivery of T.000,000 gallons ot water per day at a point In the Interior ot Australia, 328 miles from tho reservoir' In tho mountains, where It Is Impounded. Im-pounded. To forco tho wator through tho lino for this long distance not only must Us friction be overcome, but It has to bo actually lifted some 1,300 feet. This of Itself would appear to bo such an obstacle as to detor engineers from attempting the transmission, and yet, notwithstanding this and other, perhaps greater, difficulties, tho line Is to bo built. The desert through which tho plpo line Is to run' Is so Impregnated Impreg-nated with salts corrosive to Iron that It Is Impractlcablo to bury the pipes In tho soil In tho usual manner; consequently conse-quently they must be laid on tho surface sur-face This construction Introduces another an-other serious factor, namely, the expansion ex-pansion of tha lino duo to variations of temperature. When a plpo line is burled tho variations of temperature are not largo enough to be appreciable, but when exposed to tho wldo ranges of ntmosphcrlc tempcraturo, which even In tho hot Australian climate may bo 76 degrees, expansion nnd contraction contrac-tion effects aro Introduced which will produce on expansion ot flvo-olghths of an Inch In overy 100 feet. 'This expansion ex-pansion Is to bo provided for by a, special oxpanston Joint, formed by a double studlng box, with rubber rings placed at Intervals ot 120 feet. Tho best Knglish engineering talent to be had hag been engaged to supervise the erection of tho lino nnd to copo with tho original problems that Invarlatily rise In a work of this magnitude |