Dec. 20. 191S Mineral Composition of Sap, Leaves, and Stems 539 



Table XVII. — Variation in composition of the sap of the water-maple and sugar-viaple 



trees 



Constituent. 



Water maple 

 No. 744. 



No. 776.0 



No. 851.6 



Ratio 

 between 



Nos. 776 

 and 851. 



Water at 100° C 



Organic matter 



Silica (SiOa) 



Ferric and aluminic oxids (FeaOsH- A1._,0; 



Calcium oxid (CaO) 



Magnesium oxid (MgO) 



Sodium oxid (NajO) 



Potassium oxid (K._,0) 



Phosphorus pentoxid (P0O5) 



Sulphur trioxid (SO3). . .' 



Chlorin 



Total 



'^^ 



Nitrogen as nitrates 



Crude ash 



98. 2035 

 I. 7677 

 .0013 

 . 0001 



•0053 

 . 0009 

 . 0020 

 .0118 

 .0023 

 . 0004 

 .0047 



98. 2953 

 I. 6812 

 . 0016 

 . 0001 

 .0097 

 . 0018 

 . 0004 

 . 0084 

 . 0007 

 . 0002 

 . 0006 



)iS. 3227 

 1. 6247 

 . 001 1 

 . 0001 

 . 0200 

 . 0026 

 . 0009 

 .0178 

 . 0060 

 •0033 

 . 0008 



100. 0000 

 I. 0056 



0007 

 0296 



roo. 0000 

 I. 0045 



too. 0000 

 I. 0059 



0336 



.0678 



: I. 00 



: .97 



: .69 



: I. 00 



: 2. 06 



: 1.44 



: 2. 25 



: 2. 12 



•• 8.57 



: 16. 50 



: ^-33 



a Collected in 1913 just after the sap flow commenced. 



6 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 



Water maple 

 No- 744. 



Sugar maple. 



No. 776. 



No. 851. 



Ratio be- 

 tween Nos. 

 776 and 851. 



Silica (SiOj) 



Ferric and aluminic oxids (Fe203+Al203) 



Calcium oxid (CaO) 



Magnesium oxid (MgO) 



Sodium oxid (NajO) 



Potassium oxid (KjO) 



Phosphorus pentoxid (P2O5) 



Sulphur trioxid (SO3) 



Carbon dioxid, not determined 



Total. 



4.444 

 .506 



18. 003 

 2.926 

 6-751 



39- 945 

 7-651 

 1.238 



4.868 



•237 

 28. 864 



5-399 



I. 241 



24. 902 



2.079 



.518 



I. 701 

 . 220 



29. 561 

 3-893 

 1-352 



26. 211 

 8.881 

 4-834 



464 



[08 



76. 653 



i: -35 

 1: -93 

 I : I. 02 

 i: .72 

 1:1. 09 

 i: I. 05 

 1:4-27 

 1:9-33 



In Table XVII we find that the calcium, magnesium, sodium, potas- 

 sium, phosphorus, and sulphur are much higher in the sugar-maple sap 

 in 1 9 14 than in 191 3 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. 



