Surface and Epicardial Mapping in the Wolff-Parkinson-White Syndrome

the architecture of bone will not throughout life correspond with the requirements of maximal stress. In other words, the architecture of bone in the elderly is for some reason no longer functional in the sense of being arranged according to functional patterns of graphical statics as evolved by Meyer (1867) and Culmann (1866). This occurrence may obviously be of grave disadvantage should such a structure become suddenly exposed to unexpected loads. The fringe patterns in the photoelastic models clearly indicate the location of stress concentrations, and they thus provide a better understanding of fracture-lines.