16 



improved it will be well to base all calculations on the yield of first 

 sugars alone. This yield, with such cane as mentioned, will be 4 to 4.5 

 per cent, on the weight of clean cane. 



TABLE No. 12. Second masse cuite. 



TABLE No. 13. Molasses from seconds. 



In the second masse cuites the only marked difference from the first 

 molasses is in the degree of evaporation. 



In the second molasses we see the sucrose about in the same propor- 

 tion as the glucose. It is also less by double polarization a fact diffi- 

 cult of explanation. 



TOTAL SOLIDS IN JUICES. 



In Tables Kos. 1, 2, and 3 the total solids represent the readings of 

 the hydrometer graduated to give the quantity of pure sugar in an 

 aqueous solution, and corrected for temperature. 



It is evident that in a cane juice containing large quantities of solids 

 other than pure sucrose, these readings can give only approximately the 

 percentage of dry solid matter in solution. 



Instructions were therefore sent to Fort Scott to determine dry vola- 

 tile matter or total solids by evaporating a weighed portion of the juice 

 and noting the weight of the residue dried to practically constant 

 weight at 105 0. This operation was carried on in a flat platinum 

 dish, about 2 grams of the juice being used in each case. The re- 

 sults showed a marked difference in the data furnished by the Brix 

 hydrometer and the direct method, the latter being uniformly lower, 

 thus increasing the apparent purity of the juice. In this operation, 

 however, the difficulty of securing uniform desiccation is great. The 

 greater the quantity of solid matter contained in a given juice the 

 more difficult is it to secure the complete removal of the water. The 



