to his colleague in San Francisco, Superintendent Oscar H. LaGrange, in which Curry
made reference to "silver-dollar radius plates." The authors stated that the research had
failed to turn up an explanation of this term. Since it have encountered the word "radius"
in reference to die preparation on a few occasions, the first impulse was to contact the
authors or draft a letter to the editor, but then it seemed that a more thorough look at the
subject might be in order.