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A model of the simplest form of D.C. electric motor, having 2-pole armature wound with enamelled copper wire, and a permanent magnetic eld provided by a removable bar magnet. The construction of the model is completely open and all components are readily observable. A disc-type commulator is incorporated and external connection to the phosphorus bronze bushes is by means of a pair of 4 mm sockets. The motor operate on 6-8 volts D.C.