12 



daily analyses of the fresh chips as supplied to the battery, of the diffusion juice, the 

 defecated juice, and of the exhausted chips, together with analyses of the semi-sirup 

 masse cuite and sugar from nearly every strike that was made. Great care was taken 

 to have the analyses of the different products comparable with each other ; the samples 

 were always taken after at least one complete circuit of the battery had been made, 

 as starting up the battery fresh did not allow of a proper extraction of the first cells 

 filled. After the first round had been made a sample of the fresh chips was collected, 

 an equal quantity being taken from each cell filled, the whole properly mixed and run 

 through the small experimental mill, and the juice submitted to analysis. The sam. 

 pie of diffusion juice was taken from the same cells represented by the samples of 

 fresh chips, by collecting and mixing together equal volumes from the drawings from 

 each cell. The sample of exhausted chips was likewise collected from the same cells, 

 and the juice obtained from them by pressure with the small mill. Thus the analyses 

 of these three important products are strictly comparable and represent as truth- 

 fully as is possible, so far as the sampling is concerned, the character of the cane en- 

 tering the battery, of the juice obtained from it, and of the waste matter thrown out. 

 The defecated juices, having been boiled continuously in an open pan, samples could 

 not be obtained which would correspond precisely with the samples of diffusion juice, 

 but they were taken from a large receiving tank, which held the juice from a number of 

 cells, so may be taken as a fair average of the defecated juice as it went to the double 

 effect. 



ANALYSIS OF WHOLE CANES, TABLE 1. 



These analyses were made for various purposes and are inserted here simply as a 

 matter of reference. They furnish additional proof, if any is needed, of the extreme 

 variability of sorghum cane, and of the fact that analyses of a few selected canes 

 give higher results than the average of a crop, and can not be depended on to show 

 the average composition of a field of cane. Nos. 29-43 were taken from different 

 parts of the same field, and at the same time. They show a content of sucrose all the 

 way from 12.44 to 5.95 per cent. ls T o. 148 shows very well the inversion sorghum un- 

 dergoes by keeping after it is cut. It was taken from a load brought in by a farmer, 

 and had doubtless lain in the field several days after it was cut. This analysis, which 

 is simply an instance of what has been frequently observed before, shows the neces- 

 sity for the rapid handling of sorghum after it is cut. It has been proposed to buy 

 sorghum cane by its Brix indication, as is done with beets in some parts of Ger- 

 many. This analysis, with a Brix indication of T.9, and a polarization of 3.32, shows 

 very conclusively that it would not pay very well to buy cane that had stood exposed 

 on the degree Brix given by the juice. 



TABLE No. 7. Sirups (thick juices). 



