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It has long been known that a stacked yew bow woulddevelop what are known as crysals or frets (tiny lateral frac- tures or cracks) on the belly.* These frets were accepted as anatural consequence and no one seemed to have botheredabout why it happened. It did not take the scientific boyslong to figure that out. Refer to Fig. 7 and note that the regions of greatest com-pression and stress are represented by the heavily shaded lines
on this cross section. It is noted that the field of greatest com-pression appears at the apex of this diagram (A). It is furthernoted that this point of greatest compression occupies thesmallest portion of mass and area. A very small portion of thegeneral mass must bear the greatest load of this strain. Theresult is that the energy thus created soon crushes the cells ofthe fibres, thus causing the frets. Note, again, that the neutralzone (B) contains the greatest amount of the general mass withits accompaning weight. The only thing correct about thistraditional design is the back (Zone C). Why such outstand-ing men as Horace Ford, Dr. Robert P. Elmer, James Duff(not the Senator from Pennsylvania), Shepherdson, McMeen |
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