C 268 ] 
I cannot carry the pitch of their notes in my me- 
mory, even for a very fhort time. 
I therefore defired a very experienced barpfichord- 
tuner (who told me he could recollect any particular 
note which he happened to hear for feveral hours), 
to mark down when he returned home what he had 
obferved on this head. 
I have lately received an account from him of the 
following notes in different birds. 
F. natural in woodlarks. 
A. natural in common cocks. 
C. natural in Bantam cocks. 
B. flat in a very large cock. 
C. falling to A. commonly in the cuck ow. 
A. in thrufhes. 
D. in fome owls. 
B. flat in fome others. 
Thefe obfervations furnifh five notes, viz. A. 
B. flat, C. D. and F. to which I can add a fixth, 
(viz. G.) from my own obfervations on a nightingale 
which lived three years in a cage. Icanalfo confirm 
thefe remarks of the harpfichord-tuner by having 
frequently heard from the fame bird C. and F. 
As one fhould fpeak of the pitch of thefe notes 
with fome precifion, the B. flat of the fpinnet 1 tried 
them by, was perfectly in tune with the great bell 
of St. Paul’s.. 
The following notes, therefore, having been ob- 
ferved in different birds, viz. A. B. flat, C. D. F. 
and G. the E. is only wanting to compleat the fcalej 
the fix other notes, however, afford fufficient data 
for making, fome conjectures, at leaft, with regard to 
the key in which, birds may be fuppofed to fing, 
as 
