Part III.] OR POISONED BY VEGETABLE GROWTH? 
167 
fasted or have destroyed whole species at a 
mouthful. Creation must have been successive 
as far as this. Plants must have multiplied be¬ 
fore herbivorous animals were turned among 
them, and herbivorous animals before carnivorous 
animals were allowed to prey on them. 
From the arctic to the tropical regions a won¬ 
derful variety of physical conditions exists, and 
an equally marvellous variety of species, and of 
physiological constitution, in all the classes 
named displays itself. The whole of the land 
and of the water, and even of the air, of these 
and of all the intermediate regions, are crammed 
full of organic existences. I will instance only 
some of the largest quadrupeds, herbivorous and 
carnivorous, on the extremes of cold and heat, 
because these could not exist in regions which 
were not replete with vegetable and animal life 
for their food. In the arctic regions we find the 
musk-ox, the rein-deer, the huge polar bear, the 
wolf, the seal, the whale, &c.; in the tropics, 
the elephant, the rhinoceros, the camel, the 
giraffe, the lion, the hippopotamus, the shark, 
&c. But Nature is by no means content with 
this wonderful adaptation of her organic crea¬ 
tion to differing physical conditions. Like the 
chicken-fancier, who keeps his fowl-yards sepa- 
M 4 
