(ECONOMY 
confined within narrower limits in this re- 
fpedt. Yet in general, we find, that nature 
obferves this order, that the leaft animals, and 
thofe which are ufefull, and ferve for nourifh- 
ment to the greateft number of other animals, 
are endued with a greater power of propagat- 
ing than others \ 
Mites i and many other infe&s will multiply 
to a thoufand within the compafs of a very few 
days. While the elephant fcarcely produces 
one young in two years, 
The hawk kind generally lay not above two 
eggs, at molt four, while the poultry kind rife 
to 50. 
The diver or loon, which is eaten by few 
animals, lays alfo two eggs, but the duck kind, 
the moor game , partridges , &c. and fntall birds 
lay a very large number. 
If you fuppofe two pigeons to hatch nine 
times a year, they may produce in four years 
14672 young 0 . They are endued with this 
b Herodotus fpeaking of the flying ferpents in Arabia 
makes the fame refle&ion, and attributes this courfe of na- 
ture to the divine providence. Thai. 
5 I have given this paflage as it flands in the original. 
The numbers ought to have been 14760, or the expreflion 
fhould have been altered ; for he includes the firlt pair. 
He fuppofes it generally' known that pigeons hatch but 
two eggs at a time, and that they pair. 
remark- 
