The behaviour of an osglim lamp I-Introudction, drift, equilibrium and A. C. bridge measurements
Lewis Fry Richardson · Proceedings of the Royal Society of London A Mathematical and Physical Sciences · 1937
Abstract Fig. 1 shows the relation between the voltage across the osglim and the current through it during various periodic disturbances. We see a tangle of curves intersecting each other, and one of them even intersecting itself. Evidently there are many varieties of behaviour to be discussed. An attempt will be made to formulate a single law that shall apply to them all. Briefly, the first clue is that each loop except the self-intersection may be regarded as the deformation of a circle and that the equilibrium states, shown by the dotted line in fig. 1, are the deformation of a diameter of that circle. The experiments here described, although in themselves plain physics, have been pursued in the hope that the resulting empirical equations may afterwards be applies, with due caution, to some of the more mechanistic parts of psychology. How this may be is explained by quoting the summary of a paper in the Psychological Review (Richardson 1930):