CONTENTS. . Vil 



Average results of .*xalyses of many varieties of maize 4.3.> 



SCGAR and ripe grain from maize 441 



Comparison of the jricEs of sorghum and maize 443 



Pearl millet, sugar from 445 



CHAPTER XIV. 



Exhaustion of soil by growing sorghum 447 



Exhaustion, how prevented in growing sorghum 449 



average y'ield of principal crops in each state of United States, feoji 1S6S- 



1872, AND FROM 1872-1880, compared 452 



Value of ash constituents of principal crops of United States 463 



How exhaustion of soils may be prevented BY' USE of fertilizers 466 



CHAPTER XV. 

 Method of analy'sis of sorghum and maize juices used by- the author in his 



investigations 469 



Comparison of analy^ses with polarization of juices 477 



Specific gravity' of j uices 454 



Tables of average composition of sorghum juices at di.-^ferent specific gray- 



ITIES 489 



Tables of average composition of maize juices at different specific gr.vv- 



ITIES 497 



Prepar.vtion of re-agents for analy'ses of sorghum and maize juices 503 



CHAPTER XVI. 



Methods of manufacture of different sorghum sug.ir, .\nd syrup makers . . 501 

 Experiments in .sorghum sugar manufacture, on a large scale, at the De- 



p.vrtment of Agriculture, at Washington 513 



Causes of failure in the manufacture of sugar at the Department of Ag- 

 riculture, at Washington 537 



APPENDIX. 



Statistics, furnished by- the Bureau of Statistics of the Treasury Depart- 

 ment 541 



