2-8 THEPHILOSOPHY 



The manner by which the nutritious particles are extrafled frora 

 food, is very fimilar in the animal and the plant. In the animal, 

 this operation is performed by the ladteal veflels, which are diftri- 

 buted over the internal furface of the ftomach and inteflines. la 

 the plant, the fame office is performed by the veflels of the root 

 and leaves. Hence animals are organized beings nouriflied by roots 

 fituated within their bodies ; and plants are organized bodies whicii 

 abforb their nourifhment by roots placed externally. Befides, in 

 all viviparous animals, the foetus is nouriflied, not by food taken 

 in at the mouth, but by vefl'els attached to the placenta. Thefe 

 vefTels perform the fame ofiice to the foetus, that roots do to vege- 

 tables.. 



Warmth and moiflure are favourable to tKe production of large 

 and juicy plants; and the animals that feed upon thefe fucculent 

 and rich vegetables, are likewife larger than thofe which inhabit cold 

 countries, where the plants are fmaller, more rigid, and contaia 

 fewer nutritive particles.. 



Some plants grow in particular climates only. The nibus ar&iT 

 cus, a fpecies of bramble, fo common in Norway and Canada, hardr 

 !y endures the climate of Upfal, in Sweden. , But the aljine media,, 

 or chickweed, and feveral grafl"es, are diffufed over almoft the whole 

 globe. In the fame manner, fome animals, as the camel, the rhir 

 noceros, and the elephant, are produced in warm climates only ; 

 while others, as the rein-deer, glutton, and marmot, are confined to 

 the colder regions of the earth ; and man, in the animal, like fom.e 

 grafl'es in the vegetable kingdom, is univerfal, and inhabits every 

 climate. 



Some plants, as well as fome animals, are amphibious, as the rufli' 

 and the frog ; others are parafues,, and feed on the juices they ex- 

 trail:.. 



