536 
Journal of Agricultural Research 
Vol. V, No. 12 
As there was^such a wide variation in short periods of time in the com¬ 
position of the sap of this vine, it was thought desirable to collect further 
samples of the young leaves and stems in order to determine if this would 
hold true in regard to these parts. Accordingly, in June, 1915, or two 
months after the sap was first collected, and every two weeks thereafter 
for six weeks, samples of the succulent young stems and leaves repre¬ 
senting the same stage of growth were taken. Therefore, the results are 
somewhat comparable with each other and with those formerly obtained, 
since the earlier samples were taken in a similar manner in Nos. 90S and 
909. The consecutive analyses are given in Tables XII to XV along with 
those of Nos. 627 and 628 of 1912. . 
Table XII .—Variation in percentage composition of young green leaves of wild-grape 
vine in the same and in different years 
Constituent. 
Sample 
No. 627. 
Sample 
No. 908. 
Sample 
No. 910. 
Sample 
No. 912. 
Sample 
No. 914- 
Ratio 
between 
minimum 
and 
maximum. 
Water at ioo° C. 
Organic matter. 
Silica (Si 0 2 ). 
75 - 47 °° 
22. 8500 
• I 37 2 
75. 1200 
23 .3181 
.0514 
7 1 * T 975 
26. 88$i t 
. 0642 
73 - 1525 
25 - 3750 
. 0291 
72. 6015 
25. 9097 
■0537 
1:1. 06 
1:1.18 
1:4.71 
Ferric and alnminic 
oxids (Fe 2 0 3 +Al 2 0 3 ).. 
Calcium oxid (CaO). 
. 0214 
.0197 
•0394 
. 0117 
.0165 
i: 3-37 
. 7200 
• 5478 
• 758s 
•5515 
.4427 
1:1.71 
Magnesium oxid (MgO).. 
Sodium oxid (Na s O).... 
* 1337 
. II12 
• 1333 
. 1004 
. 1078 
33 
• 0356 
. O167 
. 0214 
. 0236 
. 0287 
1:2.13 
Potassium oxid (K a O)... 
•3427 
.56x9 
• 5943 
.5076 
• 5752 
73 
Phosphorus pentoxid 
(P*o 5 ). 
Sulphur trioxid (S 0 3 )... 
, 2260 
. 2104 
, 2020 
. 1891 
. 1992 
1:1. 20 
• 0634 
. 0428 
. 1043 
• °595 
.0650 
1:2.44 
Total. 
IOO. OOOO 
IOO. 0000 
100. 0000 
IOO. 0000 
IOO. 0000 
Crude ash. 
2.33OO 
2. OI4O 
2* 4595 
I- 9530 
I. 8790 
1:1.31 
Table XIII .—Percentage composition of ash of samples in Table XII 
Constituent. 
Sample 
No. 627. 
Sample 
No. 908. 
Sample 
No. 910. 
Sample 
No. 912. 
Sample 
No. 914* 
Ratio be¬ 
tween mini¬ 
mum and 
mayimiim. 
Silica (Si 0 2 ). 
Ferric and aluminic 
oxids (Fe 2 0 3 -f A 1 2 0 3 ).. 
Calcium oxid (CaO) 
Magnesium oxid (MgO).. 
Sodium oxid (NaaO). 
Potassium oxid (K 2 0 ). . 
Phosphorus pentoxid 
(p 2 o 6 ). 
Sulphur trioxid (S 0 3 )... 
Carbon dioxid, not de¬ 
termined . 
5.890 
. 920 
30. 900 
5 - 740 
i- 53 ° 
14. 710 
9. 700 
2. 720 
2. 55 ° 
. 980 
27. 200 
5- 520 
. 827 
27.899 
10.447 
2.127 
2. 6lO 
1. 600 
30. 840 
5 - 4 i 9 
. 870 
24.163 
8. 215 
4 - 239 
I.490 
. 600 
28. 240 
5 - 143 
1. 209 
25. 992 
9. 682 
3.046 
2. 860 
.880 
23. 560 
5 - 737 
i* 527 
3°. 613 
10. 600 
3 - 457 
i : 3 * 95 
1 : 2. 67 
1 : 1. 31 
1 : 1.12 
1 : 1.85 
1 :2.08 
1 : 1. 29 
1 :1. 99 
Total. 
72. no 
77 - 55 ° 
77 - 956 
75. 402 
79 - 234 
