Electric motor with Siemens' H-armature, having rolling contact with the commutator instead of the usual brushes, made by William Forgan, Edinburgh, c. 1875

Crocker and Wheeler bipolar electric motor bearing a General Electric Company Ltd nameplate inscribed 3 H.P. 230 volt. 12 amp 980 rpm No. 595

Small electric motor on steel base, probably made from a kit

Small electric motor on cast iron base, probably made from a kit

Small electric motor in cast iron frame on wooden base, probably made from a kit

Electric motor, 15 bhp, by Bruce Peebles & Co. Engineers, Edinburgh