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The forces involved in hitting a baseball are enormous. Estimates place them as high as 100 g. Not only must the instrument be able to measure them accurately in the first place but it must also be able to survive these extreme forces. Further,the instrument must be sufficiently miniaturized to be able to fit within a bore hole in the bat without fatally diminishing its strength. Preexisting accelerometers known to the present inventor fail on all scores. Solid state accelerometers have poorsignal to noise ratios and a relatively low dynamic range. Further, they have a long recovery time after a large impact.