REPORT OF THE CHEMIST. 



333 



The increase in the coefficient of purity, as shown by Table II, was 

 1.24, Tliere was bnt little change in the relative proportions of 

 sucrose and reducing sugars. In the raw juice the average quantity 

 of reducing sugars per cent, sucrose was 4.4:1; after clarification this 

 proportion was reduced to 3.98. This slight reduction was probably 

 due to the formation of a glucosate of lime, which was subsequently 

 decomposed, leaving the products of the decomposition in solution. 



In order to render the percentages of albuminoids more readily 

 comparable they have been expressed in terms of the sucrose. To 

 obtain the actual percentages of albuminoids based on the weight of 

 the juice, multiply the percentage of sucrose by the number given in 

 the column marked albuminoids percentage of sucrose. 



In the raw juice the albuminoicls per centages sucrose were 1.24 and 

 in the clarified juice .?2, showing that 58 per cent, of the total albumi- 

 noids were still retained by the juice. In 1884 the processes of defe- 

 cation and clarification removed 45.71 per cent, of the total abumi- 

 noids; in 1885-1886, 45.01; and in 18SG, 41.93. 



COMPARISON OF RAW, CLARIFIED, AND FILTERED JUICES AND FIL- 

 TERED SIRUP. 



Analyses were conducted for a period of sixteen days, to determine 

 the effect of the filtration through animal charcoal on the juice. 

 These analyses are given in Table III. 



Table III. — Comparison of raw juices, clarified juices, filtered juices, and filtered 

 sirups for a period of sixteen days. 



Date. 



1886. 

 November 25 . 

 2C. 

 26. 

 27. 

 28. 

 28. 

 29. 

 29. 

 30. 

 20. 

 December 1 . 



2. 



2. 



3. 



4. 



4. 



Means . . 



Raw juices. 



9.2 

 8.6 

 9.1 

 8.6 

 9. .5 

 9.5 

 9.9 

 9.6 

 9.4 

 9.2 

 9.5 

 8.9 

 9.0 

 9.0 

 8.6 



16.66 

 15. 55 

 16. 37 

 15. 55 

 17.21 

 IV. 07 

 17.88 

 17. :« 

 16. tW 

 16.69 

 17.14 

 16.00 

 16.29 

 16.23 

 15. 59 

 15. 78 



16.52 



Per ct. 



13.90 

 12.28 

 13. 60 

 12.00 

 14.36 

 14.21 

 15.04 

 14. M 

 13. 91 

 14.21 

 13.95 

 14.04 

 13.00 

 13.76 

 12.75 

 13.12 



13.67 



Per 



ct. 

 .82 

 .87 

 .74 

 .73 

 .46 

 .49 

 .43 

 ..53 

 .46 

 .39 

 .68 

 .60 

 .58 

 .69 

 .49 

 .60 



.60 



83.43 



78.97 

 83.08 

 77.17 

 R3.43 

 83.24 

 M.n 

 83.90 

 82. .30 

 85.14 

 81.39 

 87.75 

 79.80 

 84.78 

 81.78 

 83.14 



Clarified juices. 



10.3 

 9.7 

 9.7 

 9.9 

 9.4 

 9.6 

 9.9 

 9.4 



82.75 9.7 



18.70 

 17.47 

 17.46 

 17.87 

 16.89 

 17.27 

 17.79 

 16.89 



Per ct. 

 14. 92 

 14.82 

 14.38 

 12. 95 

 14.98 

 15. 17 

 16.01 

 15.71 

 16.04 

 14.63 

 14.11 

 14.27 



14. as 



14.56 

 14.61 

 14.18 



17.64 14.76 



Per ct. 

 .&5 

 .79 

 .79 

 .82 

 .61 

 .50 

 .08 

 ..53 

 .61 

 .46 

 .84 

 .46 

 .55 

 .43 

 .49 

 .46 



81.22 

 82.93 

 82.93 

 79.11 

 84.20 

 84.09 

 84.35 

 86.37 

 8.5.78 

 &3.74 

 80.81 

 79.85 

 87.93 

 84.31 

 82.29 

 83.96 



62 83.62 



