106 APPENDIX. 



39. A tribe of hunters confined to a limited space can- 

 not increase in number beyond a fixed and early attained 

 point. Respiration demands Carbon, and the savage 

 must obtain the Carbon he consumes in respiration from 

 the flesh of the animals he eats. The animals collect 

 from the vegetable products the constituents of their 

 organs and blood, and these are yielded to the savage 

 who lives alone by the chase, unaccompanied by those 

 non-azotized substances which, during the life of the 

 animals, served to support the respiratory process. 

 Whenever man is confined to a flesh diet, the Carbon of 

 the flesh and blood must take the place of Starch and 

 Sugar, those great sources of the supply of Carbon to 

 the grain-eating animals and civilized man. 



40. Fifteen pounds of flesh contain no more Carbon 

 than four pounds of Starch. A savage who could main- 

 tain life for a given number of days with one animal, 

 and an equal weight of starch, if confined to flesh alone, 

 would require five such animals in the same number of 

 days. 



41. From the consideration of these, and many simi- 

 lar facts, how full of interest becomes the connection 

 between agriculture and the multiplication of the human 

 family ' Agriculture has but one object, and that is, to 

 produce from the smallest possible space the largest pos- 

 sible amount of nutritious and life-sustaining substances. 



42. A cow, or a sheep, eats almost uninterruptedly 

 from sunrise to sunset (whilst at large in the meadow) , 

 and yet it wastes nothing of the amount it consumes ; 



