MAPLE SUGAR. 45 
8344, the one apparently abnormal sample among some 844 samples, 
it is noted that all of the values do not fall below the minima just 
given. Applyimg the Ross lead number determination, which has 
been advanced for application in particular to mixtures of maple and 
cane sugar sirup, to pure maple products, it would appear that 2.25 
should be considered the lower limit for this value. 
Malic acid value-—Some food chemists lay great stress upon this 
determination, the minimum value for which in sap sirups was found 
to be 0.21, with an average of 1.01 and a maximum of 1.82. Only 
6 samples out of the 481 had a value below 0.60. In the sugar sirups, 
the lowest value was 0.51, the next lowest 0.59, and all the rest were 
above 0.60, the average being 0.93 and the extreme 1.72. Table 
XXXIII shows the analytical figures of the samples having a malic 
acid value lower than 0.60. 
TABLE XXXIII.—Samples of maple products with a malic acid value below 0.60. 
Serial | Total | Insoluble yee Malic acid} Serial | Total |Insoluble| Winton | Malic 
No. ash. h ash, 
ash. |number.| Value. No. ase number. | value 
Per cent. | Per cent Per cent. | Per cent. 
6693....- . 97 } 1. 76 0.31 || 6926..... 0. 87 0.35 1. 98 0. 52 
6692...-.- 1.01 24 2. 36 .44 || 6915..... . 84 . 23 2.65 .21 
(HiBisB nae ste 26 2. 63 258) I) 8844-2 2 oe 78 aod 1. 85 -59 
6918..... - 89 26 1. 86 a | eit ate - 88 - 29 2. 28 51 
All these samples have a total ash content of 0.77 per cent or 
higher and with one exception an insoluble ash content of over 0.22. 
The lead number in each case, with one exception, is 1.85 or higher. 
It then seems proper to consider that a pure product must have a 
value of 0.60 per cent. Abnormal products may have a value below 
this, but they are not abnormal at the same time in ash or insoluble 
ash. 
Considering the subject as a whole, a pure maple product does not 
yield figures below the minima set. In one or two of the determina- 
tions it might give a figure below the minimum for such a determina- 
tion. If pure, however, it shows in the other determinations figures 
which exceed the minima. 
The minima set are: Total ash 0.77 per cent, calculated to dry 
basis; insoluble ash 0.23 per cent, calculated to dry basis; Winton 
lead number 1.85, calculated to dry basis; malic acid value 0.60, 
calculated to dry basis. 
These apply also to the samples of maple sirups which Jones ! re- 
ports as having lower minima. Of the 34 samples reported by him 
as being low in some particular, 6 show all figures below the minima 
just stated. The remainder are above in some of the determinations. 
1Vt. Agr. Exp. Sta. Bul. 167, p. 464. 
