84 Proceedings of Royal Society of Edinburgh. [sess, 
They are the curves, taken by Boeke’s method, of the vowel a (“as 
in fat ”) sung by MKendrick, Boeke, Pipping, and Hermann on a 
pitch of ut 2 = 128 v.d. and ut 3 — 256 v,d. The curves are instruct 
five as showing the same vowel sung on the same pitch by men of 
different nationalities. The results of harmonic analysis, giving, in 
plotted lines, the value of the partials, are placed below the diagram. 
There is a likeness between the a c of M ‘Kendrick and Pipping, and 
also between M Kendrick’s a c ' and Boeke’s a c/ , both in form and 
analysis. 
