. The Street railway journal . e two thousand controllers put in operation since the in-troduction of this type, not one blow-out has failed either on themetallic shield or insulating partition. The blow-out is hinged onthe pivots and can be swung back and lifted out for inspectionand cleaning. In swinging it back, the trolley connection isbroken and therefore the current can be applied only when theblow-out is closed. This arrangement renders the controllerfoolproof so far as mishandling is concerned. The winding ofthe blow-out is in one continuous wire without any joints what-ever and the me
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