. Electric railway journal . eredwood poles, 26 ft. high, carries a pair of No. 10 coppertelephone wires, connected with instruments mounted inbooths, at each siding. THIRD-RAIL CONSTRUCTIONThe third-rail construction, which is illustrated on PlateXXXIX, is of special interest on account of the high voltagecarried. The conductor rail is the standard 40-lb. section ofordinary track rail steel, held in an inverted position by semi-porcelain insulating blocks clamped to the tops of the malleableiron brackets with steel T-bolts. Ties 10 ft. long are spaced12 ft. apart to carry these brackets. The
. Electric railway journal . eredwood poles, 26 ft. high, carries a pair of No. 10 coppertelephone wires, connected with instruments mounted inbooths, at each siding. THIRD-RAIL CONSTRUCTIONThe third-rail construction, which is illustrated on PlateXXXIX, is of special interest on account of the high voltagecarried. The conductor rail is the standard 40-lb. section ofordinary track rail steel, held in an inverted position by semi-porcelain insulating blocks clamped to the tops of the malleableiron brackets with steel T-bolts. Ties 10 ft. long are spaced12 ft. apart to carry these brackets. The third-rail joints aremade with ordinary four-bolt fishplates and are bonded withOhio Brass Company No. 0000 ribbon bonds soldered tothe base of the inverted rail. The conductor rail is enclosedin a cover made of two pieces of 2-in. x 4-in. and one pieceof 1 -in. x 6-in. redwood, milled to fit the web and base ofthe rail. This protecting guard completely covers the topof the rail between the porcelain insulating blocks at the. Central California Traction Company—Third Rail Supportand Protection brackets. A chart is presented showing the voltage dropalong the 1200-volt third-rail and the 1200-volt trolley inLodi. The continuity of the third-rail is broken at highwaycrossings and the electrical circuit made complete with400,000-circ. mil rubber and lead-covered copper cable jump-ers laid in 3-in. fiber conduit and anchored in concrete at theterminals. The cost of the third-rail per mile of single track, com-plete and including cables, is given as follows: Material (total), including brackets, bonds and cables de- livered $2, Labor— Erection Bonding Cable crossings Wooden covering Shop work on rail ends, etc Total cost per mile $3, 562 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIV. No. 14. OVERHEAD TROLLEY Within the city of Stockton and for a short distance inLodi, where the track runs in city streets, 600-volt currentis conveyed to the cars
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