REPORT OF THE CHEMIST. 



135 



From the above results it is seen that no appreciable increase of su- 

 crose is obtained by topping and suckering the canes, and therefore it 

 is useless to make farther experiments in this direction. 



SOLUBLE MATTER AND WATER. 



The total soluble matter in the clean canes, obtained by repeated ex- 

 tiactions with water, and drying and weighing the exhausted residue, 

 is shown in the following table : 



Soluble matter in canea. 



No. of detenaination. 



Per 

 cent. 



Date. 



Average . 



88.42 

 88.32 

 90.70 

 90.92 

 90.45 

 90.40 



88. 80 ? 

 87. 80 5 



89. 80 \ 

 89. 80 5 

 91. 80 \ 

 91. 00 i 

 91.80 



90.00 



September 17. 

 September 18. 

 September 19. 

 September 19, duplicate. 

 Septfmber 28. 

 Do. 



Stripped and topped. 



Topped, not snckered. 



Not touched. 

 East field. 



WAKE. VAOUTTM-PAN. 



A new kind of evaporator, for the continuous reduction of thin to 

 thick liquor in partial vacuo, built by Wahl Brothers, of Chicago, was 

 in operation by the company. The pan worked well and appeared to 

 have little or no inverting effect on the sucrose, as is indicated in the 

 following analyses: 



Effect of Wahl pan evaporation. 



EXPERIMENTS IN AIR EVAPORATION. 



Attention was called, in Bulletin liso. 5, to two forms of apparatus de- 

 signed to reduce sirup to sugar by means of hot air and at a temper- 

 ature low enough to i)revent any notable inversion of sucrOvSe. 



One of those forms of apparatus was designed by Mr, Stuart, of Iowa, 

 and the other by Mr. Denton, of Kansas. The hope that a trial of these 



