. Electric railway journal . Figs. 9 and 10—Southern Pacific 1200-Volt Lines—Front and Rear Views of Sectionalizing Panels at Alameda Mole. Fig. 11—Southern Pacific 1200-Volt Lines—Sectionalization of Feeder System they left the duct in the manholes. These cables were fur-nished by four different companies and were supplied undera one-year term. containing not less than 30 per cent and not more than 33per cent of Para gum. The specifications required that theSum itself should not contain more than 3 per cent of 904 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVIII, No. 17. resinous extract and after vul
. Electric railway journal . Figs. 9 and 10—Southern Pacific 1200-Volt Lines—Front and Rear Views of Sectionalizing Panels at Alameda Mole. Fig. 11—Southern Pacific 1200-Volt Lines—Sectionalization of Feeder System they left the duct in the manholes. These cables were fur-nished by four different companies and were supplied undera one-year term. containing not less than 30 per cent and not more than 33per cent of Para gum. The specifications required that theSum itself should not contain more than 3 per cent of 904 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVIII, No. 17. resinous extract and after vulcanization should contain notmore than 5 per cent of acetone extract and not more than1 per cent of sulphur. The cable consisted of three con- Before the test the cable was immersed in water fortwenty-four hours and then subjected to 35,000 volts forfive minutes between the conductors and between the con-
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