72 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



This detailed statement of the conditions under which the experiment 

 tried is made by way of explanation of the irregularity of the ob- 



was 



Figure 6. 



servations recorded on the curve, and of the failure to carry this par- 

 ticular line of work further. The first niffht seven points were obtamecl 

 for the seven notes Ci 64 to C, 4096. This work was done by means 



