ANALYSES OF THE POTATO. 
51 
XVI. ANALYSIS OF THE ASH OF THE YOUNG POTATO VINES (Early Shaws). 
I separated the leaves from tiie stern, in conformity with the method I have usually 
pursued in the analysis of similar substances. 
Silica 
1. Analysis of the leaves , 
Quantity of ash used, 20 grs. 
5'500 
Per centum. 
27-500 
Phosphates 
4-090 
20-450 
Carbonate of lime - 
2.599 
12-995 
Magnesia 
0-230 
1-150 
Potash --- 
1.570 
7-850 
Chloride of potassium 
2'061 
10-305 
Chloride of sodium 
1-850 
9-250 
Sulphuric acid 
0-448 
2-240 
Carbonic acid 
0-731 
3-655 
Soluble silica 
0-260 
1-300 
Organic matter 
0-231 
1 -155 
97-850 
2. Composition of the phosphates. 
Phosphates - 
409 
Phosphate of peroxide of iron 
Lime ....... 
0-90 
0-73 
Magnesia ...... 
Phosphoric acid ..... 
2-08 
1-28 
4-09 
XVII. ANALYSIS OF THE ASH OF THE POTATO STEM (Early Shaw). Effervescent. 
Silica .... 
Per centum. 
5-000 
Phosphates * 
13-000 
Carbonate of lime 
11-700 
Magnesia ... 
0-560 
Potash .... 
i 
20-740 
Soda .... 
2-000 
Chloride of potassium 
34-960 
Sulphuric acid 
4-000 
Carbonic acid 
9-032 
100-992 
