. Electric railway journal . he rail is but from 15ft. to 16 ft., imposing hard service on the frog. Thenearer frog in the picture passes about 500 cars intwenty-four hours and its switch-pan life is about eightmonths. Cars pass this frog with controllers on thefirst few notches and with consequent heavy draft ofcurrent. Storage Battery Substitute forDry Cell A dry storage battery of practically the same size asthe standard No. 6 dry cell has recently been put on themarket by S. S. Stolp, Chicago, sole sales agent for J. & Company, also of Chicago. Unlike the ordi-nary storage batter
. Electric railway journal . he rail is but from 15ft. to 16 ft., imposing hard service on the frog. Thenearer frog in the picture passes about 500 cars intwenty-four hours and its switch-pan life is about eightmonths. Cars pass this frog with controllers on thefirst few notches and with consequent heavy draft ofcurrent. Storage Battery Substitute forDry Cell A dry storage battery of practically the same size asthe standard No. 6 dry cell has recently been put on themarket by S. S. Stolp, Chicago, sole sales agent for J. & Company, also of Chicago. Unlike the ordi-nary storage battery, this one contains a non-flowingelectrolyte in a cylindrical cell made of a paper fiberwhich is proof against water, acids and electrolysis, andis unbreakable. In the center of the cell is a tube to sup-ply water to prevent drying out. This tube also servesas a gas vent and as a means of taking up the changes involume of the electrolyte during charge and positive and negative elements are made from rolled. VIEW OF DRY STORAGE BATTERY COMPLETE, PLATE CONSTRUC-TION AND PARTLY FORMED ELEMENT strips of corrugated lead, and the electrolyte is an amor-phous, non-crystallizing, white substance which is said topossess exceptionally high absorbing power. Tests haveshown that the battery can be recharged an indefinitenumber of times at a lower price per charge than theoriginal cost of the ordinary dry cell. The rating of thebattery is % amp. for forty hours, 1 amp. for eighteenhours, 2 amp. for eight hours, or 3 amp. for five hours,and the average discharge potential is 2 volts. The man-ufacturers recommend this dry storage battery as asubstitute for the dry cell in the bell and buzzer signalsystems for street railway cars. The complete cell, plateconstruction and partly formed element are shown in theaccompanying illustration. As a precaution against fire the Louisville & SouthernIndiana Traction Company, New Albany, Ind., has in-stalled a 10-hp. motor, which drives
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