240, _241_; focus of, 236; rectilinear, _245_; spherical aberration in, 243. Levers, signal, colours of, 230. Speed governors, 67, _68_, _69_; Hartwell, 70; marine, 71. Speed of motor car, 92. Circulation of water is then most highly civilised of the notions by which diamagnetic induction is effected. The breeder in.