452 BULI^ETIN l66. 



but it has been thought best not to publish again this year a 

 series of exhaustive tables, but rather to state in a concise form 

 some of the final results of the season's work. 



In summarizing the work it is necessary to use the terms 

 "total solids," "sugar in juice," "sugar in beet," and 

 "purity ;" therefore for the benefit of readers in general 

 these terms are here defined. 



1 . Per ce7it total solids i?i the juice, or degrees By'ix. — Beet juice 

 consists of water, and of solid matter containing sugar, mineral 

 salts, coloring matter, nitrogenous compounds, etc. A beet juice 

 is said to have 19.9 per cent total solids. This means that 19.9 

 per cent of that juice is solid matter and the remaining 80.1 per 

 cent is water ; or, in other w^ords, in each 100 pounds of such a 

 juice there are 19.9 pounds of solid matter and 80.1 pounds 

 of water. 



2. The per cent of sugar in the juice. — This per cent is 

 determined by the polariscope. A beet juice is said to analyze 

 17 per cent sugar. This means that in each 100 pounds of such 

 a juice there are 17 pounds of pure sugar. 



3. The per ce7it of sugar in the beet. — The per cent of sugar 

 in the beet is obtained by multiplying the per cent of sugar in 

 the j nice by -f^. Thus 1 7 per cent sugar in j nice X rffV^ 16.15 per 

 cent sugar in the beet. This means that in each 100 pounds of 

 such beets without crowns there are 16.15 pounds of pure sugar. 



4. Per cent of purity of a juice. — This term is often called the 

 coefficient of purity, or better still the quotient of purity. It 

 expresses the ratio between the per cent of total solids in the juice 

 and the per cent of sugar in that same juice. That is, in any 

 particular juice, the/z^rz/)^expresses what proportion of the total 

 solids is sugar. Thus in a juice analyzed, there is found a 

 purity of 86.6 per cent. This means that if such a juice were 

 evaporated to dryness and the total solid matter obtained, then 

 of this solid matter 86.6 per cent would be sugar and the 

 remaining 13.4 per cent would be impurities not sugar ; or stated 

 in another way, in every 100 lbs. of the solid matter obtained by 

 evaporating the juice, 86.6 lbs. would be sugar and the remain- 

 ing 13.4 lbs. would be impurities and not sugar. 



In any given case the purity is obtained by dividing the per 



