ANALYSES OF THE OAT. 
95 
the same organ may and do differ in composition. This difference is no doubt due in 
part to the ascent of fluids, after the roots have performed their office; or, in other words, 
to the law of the upward and outward movements of the sap, which has been already 
referred to. 
I. ANALYSIS OF THE STRAW OF THE TANTAIN OAT. 
Silica 
Phosphates 
Carbonate of lime 
Magnesia - 
Potash 
Soda 
Sulphuric acid - 
Chlorine - 
Silex 
Phosphates 
Carbonate of lime 
Magnesia - 
Potash 
Soda 
Sulphuric acid - 
Chlorine - 
1. Unripe oat strarv. 
Top. Bottom. 
14-939 19-823 
23-959 13-039 
5-921 11-336 
1- 206 3-125 
45-072 43-541 
2- 200 1*251 
4-206 5-016 
2-497 2-866 
2. Ripe oat straw. 
Top. Bottom. 
14-839 12-417 
10-637 9-355 
8-765 8-939 
0-774 0-604 
50-623 53-484 
7-727 5-994 
4-044 6-800 
2-586 2-395 
It will be observed, that in the four preceding analyses, the percentage is calculated 
without organic matter or carbonic acid, both of which necessarily vary in every kind 
of ash. 
3. Analysis of the phosphates of the unripe straiv. 
Phosphates ... 
- 
- 
- 
Top. 
4-290 
Bottom. 
2-220 
Phosphate of peroxide of iron 
- 
- 
0-210 
0-180 
Lime ..... 
0-698 
0-698 
Magnesia .... 
. 
. 
0-840 
0-597 
Silicic acid .... 
- 
- 
trace. 
0-060 
Phosphoric acid 
- 
- 
2-542 
0-685 
