342 
. 
APPENDIX. VI. 
Nothing, however, can be more marked than 
the note of a nightingale called its jug, which 
most of the Canary birds brought from’ the 
Tyrol commonly have, as well as several night- 
ingale strokes, or particular passages in the song 
of that bird. 
I mention this superior knowledge in the in- 
habitants of the capital, because I am con- 
~ vineed, that, if others are consulted in relation 
to the singing of birds, they will only mislead, 
instead of giving any material or useful infor- 
mation.* . 
Birds in a wild state do not commonly sing 
above ten weeks in the year; whichis then also 
confined to the cocks of a few species; I con- 
ceive, that this last circumstance arises from the 
superior strength of the muscles of the larynx. 
I procured a cock nightingale, a cock and 
hen blackbird, a cock and hen rook, a cock lin- 
net, as also a cock and hen chaffinch, which 
that very eminent anatomist, Mr. Hunter, 
F. R. S. was so obliging as to dissect for me, 
and begged, that he would particularly attend 
to the state of the organs in the different birds, 
* As it will not answer to catch birds with clap-nets any 
where but in the neighbourhood of London, most of the birds 
which may be heard in a country town are nestlings, and eonse- 
quently cannot sing the supposed natural song in any perfection. 
