DISCUSSION OF CHEMICAL DATA. 81 



Samples in which per cent of soluble ash divided by insoluble ash is less than unity. 



In most of these cases the soluble ash is nearly equal to the insoluble, 

 but in a few samples, as serial Nos. 6398, 6675, 6401, 6709, 6904, and 

 6924, the insoluble is decidedly higher. It may be possible that such a 

 condition exists because of the supersaturation of calcium malate; 

 these being fresh sirups, the full amount of malate is not precipitated 

 until after standing, and, were they examined later, this figure might 

 be the same as in the other cases. Analyses of the ash for lime and 

 potash in some cases show the preponderance of the former (see p. 87). 



The results obtained by tabulating the factors expressing the rela- 

 tion of soluble to insoluble ash, by States and by groups covering 

 differences of 0.25 and 0.50 per cent, show wide variations in the 

 individual States. In the totals, 68 per cent of the samples give figures 

 between 1 and 2.24. 



Per cent of soluble ash divided by insoluble, grouped by States. 



ALKALINITY OF SOLUBLE AND INSOLUBLE ASH. 



The alkalinity is expressed as the number of cubic centimeters 

 of tenth-normal alkali necessary to neutralize the ash of 100 grams 

 of sirup. The average determination for insoluble ash is 97 cc, and 



48874 Bull. 13410 6 



