200 ARTIFICIAL MANURE. 



sufficient to manure 1-2 an acre of land with 20 

 loads of manure of the best quality, while her solid 

 evacuations, and litter, for the same period, afforded 

 only 17 loads, whose value was only about one-half 

 that of the former. 



278. It need only be added in confirmation of all 

 that has been advanced, that those who have had the 

 prudence to fill their yards and hog-pens with mea- 

 dow mud, which has thus become saturated with 

 ammonia, have in no wise lost their reward. If they 

 have been satisfied w T ith their practice, perhaps they 

 will be no less firm in their belief of success, when 

 science offers them a reason, for the faith that is in 

 them. 



279. Having thus considered all the classes of ma- 

 nure, and shown the possibility of enriching barren 

 fields, without the aid of animals, other subjects, inti- 

 mately connected with this discussion, may be here 

 introduced. 



These are, the application of manure in the 

 form of rain, snow, and by overflowing streams, 

 and the humble attempt to imitate these natural pro- 

 cesses, by irrigation. The effects in these cases are 

 alike. They are due to two distinct causes, first, to 

 the air of the water, and secondly, to the salts and 

 other materials, dissolved by, or suspended in the 



