334 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



Table III.— Comparison of raw juices, clarified Juices, cfec— Continued. 



Date. 



November 23 . 



26. 



29. 



27. 



28, 



28. 



29. 



29. 



30. 



30. 

 December 1 , 

 2 

 2 , 

 3, 

 4 

 4, 



Means 10.0 18.06 14.87 



Filtered juices. 



9.0 



16.17 

 17.67 

 16.61 

 17.10 

 17.83 

 10.14 

 18.58 

 19. 29 

 22. 22 

 18.37 

 19.39 

 17.47 

 16.89 

 19.07 

 17.19 

 16.49 



Per ct. 



12. 4S 

 14.4-1 

 13.71 

 14.28 

 13.60 

 16.19 

 15.34 

 16.34 

 18.52 

 15.27 

 15.63 

 14.20 

 14. 45 

 14. 95 

 14.56 

 14.08 



Per 



.64 



77. 18 

 8^.86 



y2. 64 



83.51 

 78.48 

 84.59 

 82.50 

 84.19 

 y-'i. 35 

 83. 12 

 80. (Jl 

 81.28 

 84.96 

 78.40 

 84.70 

 85.26 



82.14 



Filtered sirups. 



2-1.3 

 2.3.4 

 21.7 

 22.3 

 23.3 

 22.6 

 19.8 

 23.6 

 2:14 

 2.3.7 

 23.6 

 21.4 

 24.8 

 ^.1 

 U.S 

 20.8 



23.0 



44.53 

 42. 79 

 39. 56 

 40.70 

 42. .59 

 41.36 

 36. 09 

 43.16 

 42.92 

 43. 40 

 4;J.22 

 89.10 

 45. .3.S 

 44. ]0 

 44.60 

 38.00 



Per ct. 



36. 10 

 35. 93 

 33. 22 

 33.50 

 84.84 

 33.01 

 28.00 

 36. 10 

 35. 75 

 36.54 

 35. 49 

 32. 58 

 Sr. 23 

 3(\ 24 

 36. 91 

 31.80 



41.97 34.58 



Per ct. 



1.88 

 2.29 

 2.35 

 2.61 

 3.00 

 2.19 

 1.67 

 1.96 

 1.90 

 1.88 

 1.67 

 1.98 

 1.65 

 1.70 

 1.48 

 1.64 



2.00 



81.07 

 83.97 

 83.97 

 82.46 

 81.80 

 79.81 

 77.58 

 83.66 

 8.3.29 

 83.96 

 82.11 

 88.82 

 82.04 

 84.44 

 82.76 

 83.68 



The results of tliese analyses are not surprising when we conside 

 the quality of the bone-black used. Mr. O. B. Stillman, a Boston 

 refiner, examined this chay, and pronounced it to be in a very bad 

 condition. It weighed nearly 70 pounds to the cubic foot. This is 

 nearly twenty pounds heavier tlian good char should weigh. 



The decolorizing properties of this bone-black were good, but as it 

 was already laden with impurities it did not improve the purity of 

 the juice, but, on the contrary, reduced it. This was due to the im- 

 purities in the charcoal being redissolved. 



The sirups, ]:)eing heavier and already nearly saturated with soluble 

 matter, yield their impurities more readily to the action of the bone- 

 black and are improved in purity. Reference to tlio first * report of 

 this station giving analyses of raw and filtered juices will sliow this 

 same result. The charcoal in use at that time was even worse than 

 last sea.'^on. 



1 do not believe that the benefit from the mechanical filtration and 

 the decolorization will balance the damage to the juice resulting from 

 the use of spent bone-black. 



THE FILTER-PRESSES. 



The use of the filter-presses was continued this season with even 

 greater success than in 1885 and 188G. 



Very few analyses were made of the press cakes, except to deter- 

 mine loss of sucrose. However, the few analyses that were made a,re 

 presented in the following table. 



* Bulletin No. 5, p. 49. 



