AHSTIIAriS OF riBLirATlONS (IF THE FMTEI) STATES DEPARTMENT OF 

 Aiiliiai;iTKE ISSIEO IN 1889. 



FARX III. 



DIVISION OF CHEMISTRY. 



BULLETIN No. 21. 

 ExPKRIitEXTS IN THE MANUFACTURE OF SUGAR BY DIFFUSION AT 



Lawrence, La., in 1888-89, G. L. Spencer (pp. 67). — This contains 

 a description of the a])paratus and processes employed, and details of 

 works and resnlts. The dilfnsion battery nsed was of the type ordi- 

 narily emplo^yed in the extraction of sugar from the cane, and had a 

 capacity of about 200 tons of cane per day The text and tables show 

 the (piality of the cane, as indicated by analyses of the normal juice 

 and of the corresponding diffusion juices, yields of sugar, amount of 

 coal consumed, manufacturing data, and numerous other details. 



SiDiimari/. — The results of the diffusion work thoroughly demon- 

 strate the practical manufacturing yalue of the process as applied to 

 sugar cane, 'i'he cane will submit to rougher treatment in the diffu- 

 sion battery than the beet, and coFsequently the manipulations are 

 siujpler. This very ])roi)erty of the cane often tempts the batterymen 

 to careless work, resulting in loss to the planter. P]yery possible 

 precaution shoidd be taken to secure regularity of work. It should 

 be remember(Ml tliat the l);ilteryman is j^laced in a responsible posi- 

 tion, and he should l>e remunerated jiccordingly. 



Dehiys incident to the diffusion battery ^^.>re of rare occurrence. 

 A\'ith satisfactory cutters there is yery little probability of delays 

 except from bad weather. 



The results of this season's wor!' indicate the possil)ilities of diffu- 

 sion and justify a rapid inti'cxhiction of tlie ]:)rocess. 



BULLETIN No. 22. 



Experiments at Des Lignes Sugar Experizment St.\tion, Bald- 

 AviN. La„ in 1888. C. A. Cr.vmpton (pp. 36). — The equipment of the 

 factory and the method of its operation are described. The results 

 for each week are sunnnarized and compared. There are also tables 

 of the daily analyses of juices from the mills, Ayith an average for the 

 four weeks during Ayhich the factory was under complete chemical 

 control: mamifacturing data, includina* the tons of cane grown and 



