m 



SACCHARINE PRODUCTS 



127 



(A + B) C - BD 



in which 



X = per cent of dry substance to be found; 



A = weight in grams of the material mixed with B; 



B = weight in grams of pure sugar solution employed in the dilution; 



C = per cent of dry substance in the mixture of A and B obtained from the 



refractive index; 

 D = per cent of dry substance in the pure sugar solution obtained from its 

 refractive index. 



11 Table 12.— Geerligs'' Table. 



For dry substance in sugar-house products by the Abbe ref Tactometer, at 28°C. 



*Find in the table the refractive index which is next lower than the reading actu- 

 ally made and note the corresponding whole number for the per cent of dry substance 

 Subtract the refractive index obtainod from the table from the observed reading; 

 the decimal corresponding to this difference, as given in the column so marked, is 

 added to the whole per cent of dry substance as first obtained. 



