13 



TAHLE. HLCoiHji<n'ixoii of rnw juice*, clarijlnl >/., f-c. Continual 

 KILTKKKD SIRUPS. 



The results of these analyses are not surprising, when we consider 

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

 finer, examined this char and pronounced it to be in a very bad condi- 

 tion. It weighed nearly seventy pounds to the cubic foot. This is 

 nearly twenty pounds heavier than 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 

 iuice, but, on the contrary, reduced it. This was due to the impurities 

 in the char being redissolved. The sirups being 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. Refer- 

 ence to the first report of this station, giving analyses of raw and fil- 

 tered juices, will show this same result. The char in use at that time 

 was even worse than last season. 



I 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. 



THK FILTER-PRESSES. 



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

 greater success than in 1885-'8G. 



Chein. Bulletin No. 5, pp. 49-50. 



