CONCLUDING REMARKS. 201 



to more than 3 Ibs. for every individual, and is being 

 collected during his whole life. Nor is this quan- 

 tity lost to plants, for it escapes into the atmosphere 

 as ammonia during the putrefaction and decay of 

 the body. 



A high degree of culture requires an increased 

 supply of manure. With the abundance of the 

 manure the produce in corn and cattle will 

 augment, but must diminish with its deficiency. 



From the preceding remarks it must be evident, 

 that the greatest value should be attached to the 

 liquid excrements of man and animals when a 

 manure is desired which shall supply nitrogen to 

 the soil. The greatest part of a superabundant 

 crop, or in other words, the increase of growth 

 which is in our power, can be obtained exclusively 

 by their means. 



When it is considered that With every pound of 

 ammonia which evaporates, a loss of 60 Ibs. of 

 corn is sustained, and that with every pound of 

 urine a pound of wheat might be produced, the 

 indifference with which these liquid excrements are 

 regarded is quite incomprehensible. In most 

 places, only the solid excrements impregnated with 

 the liquid are used, and the dunghills containing 

 them are protected neither from evaporation nor 

 from rain. The solid excrements contain the 

 insoluble, the liquid all the soluble phosphates, and 

 the latter contain likewise all the potash which 



