66 



METHODS OF ANALYSIS. 



A table for the comparison of specific gravities ( 175 \ degrees Brix (per cent by 

 weight of sucrose) and degrees Baume, is given below. 



(2) SPECIFIC GRAVITY, WATEB. AND TOTAL SOLIDS BY MEANS OF A PYCNOMETEB. 



When a more accurate determination of the per cent of solids, or of water, 

 or of the specific gravity is desired, the determination should be made with a 

 specific gravity bottle or pycnometer. When of too high density for a direct 

 determination, the sample may be diluted, as described under (1). 



A table for the comparison of specific gravities, degrees Brix and degrees Baume. 



When the number expressing the specific gravity found by analysis falls 

 between the numbers given in the above table, the exact equivalent in degrees 

 Brix or Baum6 is found by a simple calculation. 



Example. The pycnometer shows the specific gravity of a certain sirup to be 

 1.20909. The table shows that the corresponding degree Brix is between 45.0 

 and 46.0. Subtracting the specific gravity of a solution of 45 Brix from the 

 corresponding figure for 46, we have (expressing the specific gravities as whole 

 numbers) 121,100120,565=535, the difference in specific gravity for 1 Brix 

 at this point in the table. Subtracting the specific gravity corresponding to 45 

 from the specific gravity found by analysis, we have 120,909120,565=344; 



344 



535=0.64, the fraction of 1 Brix more than 45. The degree Brix, correspond- 

 ing to a specific gravity of 1.20909, is therefore 45.64. 



If the spindle reading or pycnometer determination be made at any other tern- 



