Physics Museum - The University of Queensland, AustraliaRuhmkorff Induction CoilH.W. Cox Ltd/London Patent No. /16926 61*33*33 Consists of two concentric coils of wire wound on a cylindrical core of soft iron wires impregnated with paraffin wax, all mounted on a hollow base containing a capacitor (which is constructed from sheets of tin foil separated by paraffin paper). Contains a flat spring contact breaker but also has terminals to which a mercury b
