104 UNIVERSAL EVOLUTION 



exhausted. The difference in species of both vegetable 

 and animal kingdoms is accompanied by their geo- 

 graphical distribution over land, and in water, in such 

 a way, as to bring together the adapted organism, and 

 its adapted food, for its preservation. Insects live 

 upon a different form of sustentation from that re- 

 quired by vertebrates. By the evolution of different 

 forms, having each its own digestive apparatus, 

 adapted to a particular form of food, all are enabled 

 to survive. This law of variation is therefore a neces- 

 sary law, to preserve the process of life, which is also 

 a part only, in the general scheme of the universe. All 

 life is uniform in its method of preservation and per- 

 petuation. Every organism, both vegetable and ani- 

 mal, draws from its environment its sustentation. But 

 the organisms and their sustentation, are in as many 

 different forms, as there are species, in the one, and 

 combination of chemical elements in the other. In 

 general terms where there is peculiar form of food, 

 there will be found a species of organism to devour it. 

 Life would be impossible without this reciprocal 

 adaptation. 



The second question can be answered, by saying, 

 that knowledge consists, in being aware of the truth 

 of phenomena. The real advancement of man, from 

 the lower order of animals, has been the evolution of 

 the power to know, more and more, of his environ- 

 ment. One of the most important things is his own 

 real relation to other forms of life. This includes a 

 knowledge of species, and how they arise. The breed- 

 ing of vegetables and animals, for food, which has be- 

 come the principal source of human supply in civiliza- 

 tion, is immensely assisted by a knowledge of how 

 nature forms new species. It is thus a utilitarian 

 question of great importance. 



