244 Account of a Parrot batched af Rome. 



thne employed for the whole growth only in regard to a fmaft 

 number of individuals, let us try whether we cannot, by in- 

 duftion, difcover that the longevity of birds is proportioned 

 to the duration of their incubation. 



I fubjoin the following table in order that the reader may 

 fee, at one view, the period of the incubation of different 

 birds, and the duration of their life in the next column. I 

 muft however obferve that the time of incubation is not al- 

 together the fame in all climates : in warm climates it is acce- 

 lerated, and in cold climates retarded. But the difference 

 is very fmall, and can occafion no fenfible difference in th& 

 table. 



Table of the Period of Incubation, and of the Duration of 

 . Life of fever al Birds. 



Names of the Incubation. Duration of Life. . , 



n-< -p. A.- Authors, 



nirds. Days. i cars. 



The fwan - 43 - - - 200 nearly - Aldrovandi. 



Parrot - - 40 - - - 100 nearly - Wolmaer. 



Goofe - - 30 - - - 80 and more Willughby. 



Eagle - - 30 



ii.agic - - 3US 



Bullard - - qo I t^t 



Duck - -30^'^^" 



Turkev - - qo-' 



er obfcrved by any naturalift. 



Treatile on thefe 

 Birds. 



3 

 Peacock - - a6 to 27 - 2^ to s8 - Ariftotle. Pliny. 



Du.>„f„„f ^^ *„ ^- -o t TreatifeonPhea- 



Fheaiant - 20 to a"; - 18 to 20 - r 



^ fants. 



Crow - - 20 - - - 100 and more Hefiod. 



Nightingale j 9 to 20 - 17 to 18 - Buffon. 



Pullet - - 18 to 19 - 16 to i8 - Buffon. 



Pigeon --17 to 18 - 16 to 17 - Several obfervat. 



Linnet - - 14 - - - 13 to 14 - Willughby. 



Canary bird 13 to 14 - i'^ to 14 



Goldfinch - 13 to 14 - 18 to 20 - Buffon. 



We fiiall here obferve. that it appears by this table that 

 the fwan and parrot, which employ the longeft time in in- 

 cubation, arc not thole which live longeft : the longevity of 

 the former of ihife birds has been carried to 200 years, and 

 that of ihe latter to 100. 



In regard to the oftrich, the life of which the antients 

 carried beyond 100 vears, we can lind no relation between 

 this period and that of the incubation, as the female feldom 

 fits on the egg><, which are hatched by the heat of the fun. 

 The cafe is the fame with the crane a«d the heron^ to which 



the 

 6 



