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Show TESTING THE VOICE. j B A machine called the "stroboscope" has been B invented through which to study the action and I B to count the vibrations of the vocal chords during j B speaking or singing. To produce any tone at all, I B the rate of vibration, must be at least eighteen, B while the lowest tone in human voice (low D of B the bass), rarely falls below seventy-three vibra- B tions per second. There is a slanderous story B going the rounds, which we have never for a mo- fl ment believed, to the effect that last week a cer- , M tain well known scientist secretly introduced a M stroboscope into the assembly hall of a woman's 'j B club id this city, and prepared everything, so that M without attracting attentlpn, he could count the i M vibrations of the different voices of the members i M of the Club, but that In four minutes after the B conversation began, the machine burst, and that j M it was fortunate that it did, for when the explo- , ,, M sion came the machine was smoking, and would f M have been in flames in another minute. , M |