Manganese Sulphate upon the Growth of Barley. 
573 
Each litre of culture solution 1 contained, besides the requisite amount 
of copper sulphate: 
Potassium Nitrate . . . . i gram. 
Magnesium Sulphate ... 0.5 „ 
Calcium Sulphate .... 0-5 ,, 
Sodium Chloride .... 0.5 gram. 
Potassium Phosphate . . . 0.5 ,, 
Ferric Chloride . . . Trace (0-04 gram). 
gram. 
3 00 
2-75 
2*50 
2-25 
2-00 
I *75 
1-50 
1-25 
1-00 
•75 
•50 
•25 
Total. 
Shoot. 
Root . 
3 4 5 6 7 8 0 1 
Curve 1. Showing the result of the initial experiment on the action of copper sulphate on the 
growth of barley in the presence of nutrient salts. 
3. 1 :12,500 C.S. 
4. 1 : 25,000 „ 
5. 1 : 50,000 „ 
6. 1 :100,000 ,, 
7. 1 : 250,000 C.S. 
8. 1 : 500,000 ,, 
9. 1 : i,ooo,oco „ 
1. Control—glass distilled water. 
1 D. H. Scott, Structural Botany (Flowering Plants.), p. 202. 
Qq 2 
