Dec. 20, 1915 
Mineral Composition of Sap, Leaves, and Stems 
' 539 
Table XVII.— Variation in composition of the sap of the water-maple and sugar-maple 
trees 
Constituent. 
Sugar maple. 
Water maple 
No. 744- 
No. 776.° 
No. 851. & 
Ratio 
between 
Nos. 776 
and 851. 
Water at ioo° C. 
Organic matter. 
Silica (Si 0 2 ). 
Ferric and alnminic oxids (Fe 2 0 3 +A1 2 0 3 ) 
Calcium oxid (CaO). 
Magnesium oxid (MgO). 
Sodium oxid (Na^).. 
Potassium oxid (K 2 0 ). 
Phosphorus pentoxid (P 2 0 5 ). 
Sulpnur trioxid (S 0 3 ). 
Chlorin. 
Total. 
98. 2035 
1. 7677 
.0013 
. 0001 
•0053 
. 0009 
. 0020 
. 0118 
.0023 
. 0004 
.0047 
100. 0000 
9 8 - 2 953 
1. 6812 
. 0016 
. 0001 
. 0097 
. 0018 
. 0004 
. 0084 
. 0007 
. 0002 
. 0006 
100. 0000 
98.3227 
1. 6247 
. 0011 
. 0001 
■. 0200 
. 0026 
. 0009 
. 0178 
. 0060 
•0033 
. 0008 
100. 0000 
1 : 1.00 
1 : .97 
1 : .69 
1 : 1.00 
1 : 2. 06 
1 : 1.44 
1 : 2. 25 
1 : 2.12 
1 : 8. 57 
1 :16. 50 
1 : i* 33 
d X . 
25 
Nitrogen as nitrates. 
Crude ash. 
1. 0056 
. 0007 
. 0^96 
1.0045 
0336 
1. 0059 
. 0678 
1 : 1.00 
1 : 2.02 
o Collected in 1913 just after the sap flow commenced. 
t> Collected in 1914 just after the sap flow commenced, from same point on the same tree as No. 776. 
Table XVIII.— Percentage composition of ash of samples in Table XVII 
Constituent. 
Water maple 
Sugar maple. 
Ratio be* 
tween Nos. 
776 and 851. 
No*. 744 - 
No. 776. 
No. 851. 
Silica (SiOa) . 
Ferric and aluminic oxids (Fe 2 0 3 +Al 2 0 3 ) 
Calcium oxid (CaO). 
Magnesium oxid (MgO). 
Sodium oxid (Na-P). 
Potassium oxid (K 2 0 ). 
Phosphorus pentoxid (P 2 O s ). 
Sulphur trioxid (S 0 3 ). 
Carbon dioxid, not determined. 
4 444 
. 506 
l8. 003 
2.926 
6- 751 
39 - 945 
7 - 651 
1. « 3 8 
4 868 
•237 
28. 864 
5 - 399 
1.241 
24. 902 
2. 079 
.51* 
I. 701 
. 220 
29. 561 
3- 8 93 
i- 35 2 
26. 211 
8.881 
4.834 
i: *35 
i: *93 
1:1. 02 
1: . 72 
1:1.09 
1:1.05 
1:4.27 
' I: 9 - 33 
Total. 
8l. 464 
68. 108 
76.653 
In Table XVII we find that the calcium, magnesium, sodium, potas¬ 
sium, phosphorus, and sulphur are much higher in the sugar-maple sap 
in 1914 than in 1913 and the silica is lower, while the water, organic 
matter, iron, and aluminum are about the same in both years. The 
largest varying constituents are sulphur and phosphorus. 
Again, on comparing the sap of the sugar maple with that of the water 
maple, there are found large differences in the calcium, magnesium, 
sodium, potassium, phosphorus, sulphur, and chlorin, while the water, 
organic matter, silica, iron, and aluminum are about the same. 
