Show ESCAPE OF ELECTRICITY A An Interesting Test of Laks Leaks Prom From Troley Trolleys to Water Mains i Th The Record the other day published a dig t of a on the tho conductor of oC the water mains of R it I 1 made by A A an electrical engineer of 3 34 N The report I Is extremely an Is 15 based upon a large larg number of tet teats and examinations made of the mains in aU all parts of bf ProVI denee dene where the maIn maln are In streets by electric railways Mr Knudson round found that all of te the mains were carrying more or l less varying In olt In a way difficult to explain He also aho found evidences In a great many of bl lila of damage to the mIm mains b by el which w was l slowly the lives of the mains The injury 1 l not wrought upon n ras th the current entering the main but on its IS for water There me st at the Joints wh the tho experts cUs cals electrolysis s flUn cause softening of the thee to such an extent that the metal e te coul be cut wih with a knIfe Leakage is I bound to follow such uch Mr Ir on finds that the I cause canse or of the CN or of the electricity from the rais rails Is in the defective I bonding of the die rai rail joint joInts This th the return current current to shot shoot Into permit the J j i ground rou and seeking another conductor I se Into the wa Water ter pipes 1 Whilo lle Mr Knudson think thinks It Is not i within bil his provInce to specIfy methods i to I b be U b the railway company beter better to their current currents he recommends t that attention be cale called to the necessity of early ll acton action to correct the excessive escape of f Not only should hould the bont bons be rc but the frogs and 0 snitches at al all other turnouts hould be betted ted and those found defective prompt I ly r I It Is the practice m some roada periodically to examine hy by of bf testing the entire bondIng system f their lines and repair those found defective S i The various arious places In the city Cn can be teto tested and from time to time b bus by byuse us use of oC the voltmeter In the water water depart department i ment and i If the railway com company pan is dis disS S posed oso to corret correct place places found to be menacing immediately dangerous flow J I t tan n be But i it should be fow un t I t that at there can be no u i complete immunity from electrolytic ara amago o to water mains cause caused by the f straying railway current currents so long Jong as the single trolley system is used in which the r I rais form ono one sIde of the circuit are f t ta contact with te the erth earth Current which once entes enters the tho water mains must them at various points and more or Ics im d or ou outside ide nor neer the joints ovo ove h he entire system an and even een he smallest tracton fraction of curent current passe out oct hI bC hIS S th the vator mains through earth or w tr ter injury to the water mains must Zomo rul rulL The acton action in ay be bet t and long go ext unnoticed b but t 1 In J I oC the and serIously the lre life |