MAPLE SUGAR. 5 



Table II. — Comparison of sugar and sirup results (Jones). 1 



Maple sugar. 



Sirup from same 

 sugar. 



Calculated to dry 

 basis from ap- 

 proximately 65 

 per cent solids. 



Total 

 ash. 



Insolu- 

 ble ash. 



Total 

 ash. 



Insolu- 

 ble ash. 



Total 

 ash. 



Insolu- 

 ble ash. 



Per cent. 

 0.80 

 1.08 



Per cent. 

 0.34 

 .64 



Per cent. 

 0.56 

 .52 



Per cent. 

 0.22 

 .18 



Per cent. 

 0.86 

 .80 



Per cent. 

 0.34 



.28 



1 Jones does not state that the figures on " Maple sugar" were calculated to a dry basis. The figures on 

 "Sirup from same sugar" are on a basis of 11 pounds to the gallon. 



A case has never been noted in which by this treatment the sirup 

 produced gives all analytical figures below the minima discussed on 

 page 45 unless the maple sugar has been adulterated by the use of 

 some other sugar. 



Trials were also made to determine whether making into a sugar 

 a second time tended to reduce these figures. Samples of sugar 

 sirups were converted into sugar and then redissolved to a sirup of 

 standard density. As shown in Tables I and II, this treatment does 

 not materially change the results. 



Table III. — Analysis of sugar sirups converted into sugar and redissolved to sirup. 



Sirup from first sugaring. 



Sirup from second sugaring. 



Total 

 ash. 



Insolu- 

 ble ash. 



Lead 

 number. 



Malic 

 acid 

 value. 



Total 

 ash. 



Insolu- 

 ble ash. 



Lead 

 number. 



Malic 

 acid 

 value. 



Per cent. 

 0.78 

 .87 

 .83 



.77 



Per cent. 



0.23 



.24 



.27 



.24 



1.86 

 2.14 

 2.22 

 1.86 



0.59 



.76 

 .73 

 .60 



Per cent. 



0.77 



.91 



.82 



.76 



Per cent. 



0.23 



.24 



.28 



.25 



1.88 

 2.22 

 2.25 



1.87 



0.60 



.78 

 .74 

 .62 



The removal of this precipitated mineral and organic matter, 

 spoken of in commercial manufacture as the refining of the maple 

 sugar, is simply the removal of suspended matter contained in the 

 sugar sirup. As shown by Table III, this does not tend to reduce the 

 analytical figures below the minimum for pure products. 



In a later publication * Jones calls attention to the effect of con- 

 centration on the percentage of the ash and also mafic acid value. 

 As a liquid procfuct is concentrated, its power of holding salts in solu- 

 tion becomes less; hence one expects to find less ash in a-more con- 

 centrated solution than in one of lower concentration. This is true 

 of maple, as shown in Table IV, 



i Vt. Agr. Exp. Sta. Bui. 167, p. 466. 



