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nature, scents which produce in him certain sensorial 

 requirements similar to those which earth itself manifests. 

 The earth as a planet is a laboratory of oxygen for the 

 sun, and we ourselves see that everything which con- 

 tains oxygen in abundance acts refreshingly and agree- 

 ably on the human organism, and man is unconsciously 

 attracted towards the flora of the earth, instinctively 

 running trom all that presents itself as mere dead re- 

 mains in process of putrefaction. Actuated by abhorrence 

 of putrid stench, he buries away under the ground this 

 objectionable matter, and as the earth is nourished by 

 dead refuse of cosmic worlds, soon after the surrender 

 to its keeping of human refuse it throws out, as though 

 in gratitude, new forms of vegetable growth, with sweet- 

 smelling flowers, as though to teach man how to earn 

 in place of unpleasant and unwholesome smells, fresh, 

 healthy, aromatic air so indispensable for his own health 

 and energy. 



3) Together with the first vital activity of the human 

 organism appears the sense of taste. The frame of a liv- 

 ing man naturally demands continual renewal of decay- 

 ing parts. His nature experiences hunger and demands 

 food as fresh material, the consumption of which food 

 rouses the distinguishing sense of taste. One food is 

 tasty, another the reverse; one satisfies, another does 

 not. Moreover at one time one food, at another time 

 anothere seems the more agreable, the appetite indi- 

 cating in this way the substance most needed by the 

 frame. 



4) Sight now follows. The first three sensations were 

 the manifestations of the internal organic needs of man, 

 but in sight a connection is established with the outer 

 world. Looking out into space, the human creature, thanks 

 to this faculty, learns to understand at a glance what 

 places are and are not suitable to inhabit, what animals 

 are dangerous and what harmless; in a word how and 

 when and where he must guard his own safety and 

 welfare. 



