da]|q4e jos AUP HIENT 
Dh 3 apSPallg-a 
21 Aone | yoquyjn 
The first three records are conspicu- 
ous instances of a comprehensive 
voice lacking determinate pitch in 
the higher register Many other bird 
voices _are_similarly indefinite. 
DIAGRAM SHOWING THE PITCH OF FIFTEEN 
BIRD SONGS RELATIVELY WITH THE KEYBOARD. 
© |mippteEC 
Uieegoe. ne ed Ve a COC ys a eer 2 da 
XXX11 
