ON THE SINGING OF BIRDS. 
. natural in woodlarks. 
. natural in common cocks. 
. natural in Bantam cocks. 
. flat in a very large cock. 
. falling to A. commonly in the cuckow. 
. in thrushes. 
. in some owls. 
. flat in some others. 
ses observations furnish five notes, viz. 
A. B. flat, C. D. and F. to which I can adda 
sixth, (viz. G.) from my own observations on a 
nightingale which lived three years in a cage. 
I can also confirm these remarks of the harpsi- 
chord-tuner by having frequently heard from 
the same bird C. and F. 
As one should speak of the pitch of these 
notes with some precision, the B. flat of the 
spinnet I tried them by, was perfectly in tune 
with the great bell of S¢. Paul’s. 
The following notes, therefore, having been 
observed in different birds, viz. A. B. flat, C. 
D. F. and G. the E. is only wanting to com- 
plete the scale; the six other notes, however, 
afford sufficient data for making some conjec- 
tures, at least, with regard to the key in which 
-birds may be supposed to sing, as these inter- 
vals can only be found in the key of F. with a 
sharp third, or that of G. with a flat third. 
PoP Dp Pee & 
351 
