72 



MEAN COMPOSITION OF THE DIFFUSION JUICES FOR THE SEASON 



OF 1SSG. 



Sampling. From each cell as it was withdrawn a measured quantity 

 of the diffusion juice was taken until an entire circuit of the battery 

 had been made. The mixed samples was then subjected to analysis. 1 



Mean composition of diffusion juices . 



September 9 to* October 1 : Per cent. 



Sucrose 5. 75 



Glucose 2.32 



Total solids 11.77 



September 36 to October 28 : 



Sucrose 4. 90 



Glucose 3.39 



Solids 11.34 



(6) WORK NOT DONE BY THE DEPARTMENT OF AGRICULTURE. 



D. J. Browne 2 says the juice of sorghum grown in France contained 

 from 10 to 1G per cent, sugar, a third part of which is sometimes un- 

 crystallizable. 



0. T. Jackson 3 analyzed samples of sorghum canes sent him by the 

 Department, and obtained from 9 to 12 per cent., saccharine matter to 

 weight of stalk. 



From samples grown in Massachusetts he obtained from 10.6 to 14.G 

 per cent, saccharine matter. He made no attempt to separate the dif- 

 ferent sugars in the juice. 



In same volume, p. 313, is given an analysis made at Verrieres, 

 France, showing 16 per cent, sugar, of which 10.33 is sucrose and 5.67 

 glucose. 



0. T. Jackson reports further analyses in Agricultural Report, 1857, pp. 

 185 et seq.j in which the per cent, of sacchariae matter varied from 9.36 

 to 16.6, and the sucrose from nothing to a large quantity, the exact 

 amount of which was not determined. Dr. Jackson made no determina- 

 tions of the sugar in the juice, but calculated the saccharine matter 

 from the specific gravity. 



J. Lawrence Smith 4 made several analyses of sorghum, from which he 

 concludes that " the sorgho contains about 10 per cent, crystallizable 

 sugar. 5 



1 Op. cit., pp.' 18, 19. 



2 Department of Agriculture. Report 1856, pp. 309-313. 



3 Op. cit., p. 308. 



4 Agricultural Report 1857, pp. 192 et seq. 

 6 Op cit., p. 196. 



