$64 
APPENDIX. VI. 
also observed the breath of a robin (which ex- 
erted itself) so condensed in a frosty morning, as . 
to be very visible. 
To make the comparison, however, with ac- 
curacy, between the loudness of a bird’s and the 
human voice, a person should be sent to the 
spot from whence the bird is heard; I should 
rather conceive that, upon such trial, the night- 
ingale would be distinguished further than the: 
man. is 
It must have struck every one, that, in pass- 
ing under a house where the windows are shut, 
the singing of a bird is easily heard, when, at 
the same time, a conversation cannot be so, 
though an animated one. 
Most people, who have not attended to the 
notes of birds, suppose that those of every spe- 
cies sing exactly the same notes and passages, 
which is by no means true, though it is admit- 
ted that there is a general resemblance. 
Thus the London bird-catchers prefer the 
song of the Kentish goldfinches, but Essex chaf- 
finches; and when they sell the bird to those 
who can thus distinguish, inform the buyer that 
it hath such a note, which is very well under- 
stood between them. * 
* These are the names which they give to some of the night~ 
ingale’s notes: Sweet, Sweet jug, Jug sweet, Water bublle, 
