Dec. 20,1915 
Mineral Composition of Sap, Leaves, and Stems 
537 
Table XIV .—'Variation in percentage composition of young green stems of wild-grape 
vine in the same and in different years 
Constituent. 
Sample 
No. 628. 
Sample 
No. 909. 
Sample 
No. 911. 
Sample 
No. 913* 
Sample 
No. 915. 
Ratio be¬ 
tween mini¬ 
mum and 
maximum. 
Water at ioo° C . 
79. 2500 
84.2750 
81.938s 
83.3210 
82. 6645 
i ; 
1. 06 
Organic matter. 
20. O437 
14.8654 
17• 0893 
15 * 7397 
16. 44 S 3 
1 1 
1- 35 
Silica (Si 0 2 ). 
. OO4I 
. 0048 
. 0069 
.0037 
. 0040 
1 1 
1. 86 
Ferric and aluminic 
oxids (Fe 2 0 3 +Al 3 0 3 ) . 
. OOO3 
. 0051 
.0038 
. 0041 
.0032 
1 : 
17. 00 
Calcium oxid (CaO). 
. III 4 
• 1558 
. 2244 
. 2488 
.1792 
1 : 
2. 23 
Magnesium oxid (MgO). . 
• 0346 
•0539 
. 0642 
.0367 
•0557 
1 : 
1. 86 
Sodium oxid (Na 2 0 ) . 
. OI7I 
. 0078 
• 0133 
.0158 
.0093 
1 1 
2. 19 
Potassium oxid (K a O). .. 
•3883 
• 4813 
• 5154 
. 4846 
• 5098 
1 i 
33 
Phosphorus pentoxid 
(P s o 6 ) .. 
. I277 
• I0 55 
. 1078 
. 1010 
. 1009 
1 : 
1. 27 
Sulphur trioxid (SC 3 )... 
. 0228 
.0454 
.0364 
. 0246 
. 028l 
1 : 
1. 99 
Total. 
100. 0000 
100. 0000 
100. 0000 
100. 0000 
IOO. OOOO 
Crude ash. 
I. 0200 
1.1490 
1. 2810 
i- 3790 
I.2I7S 
1 : 
i -35 
Table XV. —Percentage composition of ash of samples in Table XIV 
Constituted. 
Sample 
No. 628. 
Sample 
No. 909. 
Sample 
No. 9x1. 
Sample 
No. 913. 
Sample 
No. 915. 
Ratio 
between 
minimum 
and max¬ 
imum. 
Silica (Si 0 2 )... 
Ferric and aluminic 
oxids (Fe 2 0 3 +AL 0 3 ).. 
Calcium oxid (CaO). 
Magnesium oxid (MgO). 
Sodium oxid (Na 2 0 ).... 
Potassium oxid (K 2 0 ).,. 
Phosphorus pentoxid 
(p 2 o 5 ). 
Sulphur trioxid (S 0 3 )... 
Carbon dioxid, not de¬ 
termined . 
0.400 
.030 
ro. 920 
3-390 
1. 680 
38. 070 
12. 520 
2. 240 
0.420 
.440 
13 - 56° 
4.694 
.679 
41. 892 
9.184 
3 - 95 1 
O. 540 
.300 
17. 520 
5 - OI 3 
1.039 
40. 241 
8. 419 
2. 840 
0.270 
.300 
18. 040 
4 * US 
i- 145 
35 -140 
7. 322 
1. 784 
O.330 
. 260 
14. 720 
4-578 
.764 
41. 876 
8. 291 
2- 305 
i : 2. 00 
1 : 14. 67 
1 : 1. 74 
1 : 1.48 
1 : 2.47 
1 : 1.19 
1 : 1. 71 
1 : 2. 21 
Total. 
69. 250 
74. 820 
75 - 912 
68. 116 
73 - I2 4 
In Tables XII and XIV it will be found that the ratio between the 
lowest and the highest result obtained for each of the other mineral 
constituents in the several samples of leaves and stems is more constant 
than it is for the silica, iron, and aluminum. It will further be found 
that the results obtained this year on the different samples corroborate, 
except in one instance, those of 1912 in showing that there is a con¬ 
centration of all the constituents in the leaf compared with the stem, 
and the exception is that whereas the potassium content of the stem 
in 1912 was greater than in the leaf, this year (1915) it was less in every 
case. 
