13 



The variations in the proportion of sucrose to glucose in the thick 

 juice as shown on Table No. 7 are much greater than would be expected 

 from the analyses recorded in the foregoing tables. The thorough mix- 

 ing of the products of large numbers of diffusion charges should tend 

 theoretically to equalize the ratios of the two sugars. This remark- 

 able variation is explained partly by the addition of sugar to the clari- 

 fied juices in order to promote crystallization in the vacuum pan. 



TABLE No. 8. Masse cuites. 



The remarks applied to the analyses of the sirups, Table No. 7, belong 

 equally well to Table No. 8. A distinction is made of the samples for- 

 tified by the addition of sugar. The differences between direct and double 

 polarization, which are so plainly shown in the analysis of sirups, masse 

 cuites, and molasses, will be discussed in another place. The greater 

 reliance should be placed on the indirect polarization when it is care- 

 fully done. Yet the difficulties attending an accurate analysis of these 

 substances are very great, and every precaution known to science will 

 not always lead to perfectly satisfactory results. 



The remarkable difference between the direct and indirect polariza- 

 tions will at once be remarked in the mean results of Table No. 5. In 

 general, as has been already said, the preference should be given to the 

 indirect polarization when carefully done. In the present case, however, 

 the percentage of sucrose by indirect polarization appears to be too 

 high. The mean percentage of organic solids not sugar is only 4.21, a 

 much less proportion than would be expected. 



