. Electric railway journal . any otherone thing for the extremely bad electrolysis conditionswhich existed in many cities. With the improvementof the return circuit through the use of heavier rails,better bonds, welded joints and supplementary feeders,railway loads also increased and often at a rate fargreater than the increase in the return circuit. Theresult was that with the phenomenal grovsrth of theelectric railways those factors which were not vitallyand immediately necessary to the operation of the carswere often slighted or entirely neglected. In not a few instances the electrolysis pr
. Electric railway journal . any otherone thing for the extremely bad electrolysis conditionswhich existed in many cities. With the improvementof the return circuit through the use of heavier rails,better bonds, welded joints and supplementary feeders,railway loads also increased and often at a rate fargreater than the increase in the return circuit. Theresult was that with the phenomenal grovsrth of theelectric railways those factors which were not vitallyand immediately necessary to the operation of the carswere often slighted or entirely neglected. In not a few instances the electrolysis problem was one of thefactors neglected during this early period. From the very first appearance of electrolysis, nearlythirty years ago, there has been no end of speculationand uncertainty concerning the whole subject. Thedifficulty of observing the extent and progress of dam-age on underground structures; the rapidly changingconditions resulting from extensions, improvements and _ abandoned power sta-tions ; the great varia-. DR. E. B. ROSA Secretary AmericanCommittee on Electrolysis tions in local c o n d i-tions, as, for example,earth resistance anddifferent types ofroadbed, as well asmany other factors,all contributed to thedifficulty of adequatelyanalyzing and solvingthe problem. Manymethods of correctingthe trouble were pro-posed and used, but nostandard practice hasever been agreed uponin this country otherthan the maintenanceof the return circuitto the highest stand-ard practicable. The cable-owning interests early foundthat a substantial degree of protection could be securedby draining the sheaths of the cables in areas wherethey were found to be positive to the earth, to the nega-tive railway bus or to some other point on the returncircuit, and this practice has been and now is consist-ently followed. The same method was employed, in somecases by the railways and in others by the water and gascompanies, in an effort to protect the underground pip-ing systems. This meth
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