1 12 
CANARY-BIRD. 
chufes one ox a different colour. In general;, 
the white go through the whole procefs with 
equal fuccefs ; they pair, build, and hatch as 
well, and better than any of the others, and 
the white fpangled birds are likewife the ftrong- 
eft of all. 
Notwithftanding thefe differences. in the dif- 
pofxtion, temperament, and fertility of thefe birds, 
the time of incubation in all is the fame ; all of 
them fit thirteen days, and when it happens a 
day lets or more, it is owing to fome accidental 
circumftance : cold retards the exclufion of the 
young, and heat accelerates it. Accordingly, 
it fornetimes happens that the firft fitting in A- 
pril lafis thirteen days and a half, or fourteen 
days, if the air is at that time cold ; on the 
contrary, the third hatching, which happens 
during the great heats of July or Anguft; lafis 
only twelve days or twelve days and a half. 
The bad eggs ought to be feparated from the 
good ; but in order to know them certainly, 
you fhould wait till they have been fat upon for 
eight or nine days; then take each egg by the 
two ends for fear of breaking them, and hold 
them again ft the fun or a lighted candle ; tliofe 
that are clear muft be rejected ; it would only 
fatigue the hen to leave them with her. In 
thus detaching the clear eggs, of three nefts we 
may make only two ; and the third lien being 
