LVIII. <i>The limits of economy of material in frame-structures</i>

Limits of Economj of i!~iaterlal in F'rame-strttctures. 589Final results.--Thedeparture of the curves iu a straight horizontal line shows the presence of overtones as well as the prime tone; while the fact that the curves appear to asymptote to this line shows that the overtones die away quicker than the fundamental.By both methods of experiment we see that the two curves agree best when p = ' 8 ; then substitute this value in ( 9) and we get a value for the frequency of vibration such that N~ ='986.I hope to make further experiments on tuning-forks or bars of acoustic frequency.I desire to render my best thanks to one of flay colleagues, Dr. E.