In the following pages only such chemical data are given as are neces- 

 sary to illustrate the experiments made. Much of the chemical work 

 is yet undone, and it would delay too long the publishing of this bulletin 

 to wait for its completion. All the details of the chemical work for all 

 three stations will therefore be collected and published in a separate 

 bulletin, viz, No. 18. The success of the work at all three stations has 

 been most gratifying, and the diffusion process for the manufacture of 

 sugar has been advanced beyond the experimental stage by the labors 

 of this Department, beginning in 1883, and it is now offered to the sugar- 

 growers of the country with the confident assurance that it is the best, 

 most simple, and most economical method of extracting sugar both from 

 sorghum and sugar canes. 

 Respectfully, 



H. W. WILEY, 



Chemist. 



Hon. NOKMAN J. COLMAN, 



Commissioner. 



