282 REPORTS ON THE STATE OF SCIENCE, ETC. 



Table I 



Notes to columns : 



1. Sources : W, watch ; P, sound-pendulum ; FA, fall-apparatus ; TF, 

 tuning-fork (s) ; OP, organ-pipes ; VO, vacuum-tube oscillator ; AO, audio- 

 oscillator ; V, variator. 



2. Approximate range in db. 



3. No. of subjects (when stated). 



4. Methods : C, Constant method, or some variety thereof • L. method of 

 Limits ; *, see text. 



5. Modal value of threshold, when constant {k). 



6. Deviations from a constant value at low or high intensities ; course of the 

 threshold over range studied, etc. 



