CERTAIN USEFUL ANALYSES. 197 



mediately be precipitated in the form of white floccu- 

 lent masses, the abundance of which may indicate 

 the proportion present in the guano. 



5. It is safe still farther to test the organic matter, 

 by mixing with quicklime, as described, page 106. A 

 very strong odor of ammonia should become percep 

 tible immediately, and continue to be given off for a 

 considerable length of time. 



The foregoing instances are of a nature so simple 

 as to be easily understood, and are sufficient to show 

 that the farmer, without becoming a chemist, may 

 still make some valuable experiments for his own sa 

 tisfaction; and this with such means as are to be found 

 in any country village. 



I might multiply cases of the same nature to an 

 indefinite extent, but as this is not an extended treatise 

 upon analytical chemistry, the above illustrations are 

 sufficient for the present purpose. 



One great end will be attained by all who go 

 through with such examinations as these, or who ex 

 periment upon the various substances mentioned in the 

 previous chapters. They will soon familiarize them 

 selves to such an extent with chemical phenomena, 

 and terms, that they will be able, far more readily 

 and perfectly than ever before, to comprehend the 

 writings and discoveries of scientific men, and to draw 

 from them truths profitably applicable to their own 

 pursuits. 



17* 



