6ANARV.-BIP.fc. 121 
ther warm place. While this function is going 
on, that is, for fix weeks or two months. Na- 
ture labours to produce new feathers ; and the 
organic molecules which had been previoufly 
■employed in forming the feminal fluid are now 
engaged in this new production ; accordingly, 
when moulting, birds neither breed nor pah ; 
for the fuperflux of life is wanting, which eve- 
ry being mull have before it can convey it to 
others. 
The mod fatal and mod common difeafe 
that the young Canary-Birds efpecially are fub- 
ject to, is that called the Surfeit, in which their 
bowels deem to defcend to the extremity of the 
body. The inteflines are feen through the 
fkin, in a ftate of inflammation, rednefs, and 
diftenflon ; the feathers on the part fall off j the 
bird grows emaciated, gives over eating, though 
he fits perpetually befide his meat, and dies in 
a few days. The caufe of this difeafe is the 
too great quantity, or too fucculent quality of 
the food. All medicines are fruitlefs ; diet alone 
can fave a few out of a number of birds thus 
affeCted. They rand be put into feparate cages, 
and nothing given to them but water and let** 
tuce-feed : this food is cooling and purgative, 
it tempers the ardor which confumes them, 
and fometimes caiifes evacuations that fave their 
lives. In fine, we may obferve, that this dif- 
eafe proceeds folely from our method of rearing 
L 
