REPORT OF THE CHEMIST. 



137 



DIAGEAM SHOWING AVERAGE GEOWTH OF WHEAT PLANTS. 



Continuous line — Plants in potting soil. 



Broken line — Plants in soil + 5 % MgS04 + excess of CuO. 



Dotted line— Plants in soil + 5 % MgSO^. 



Wheat. — Seed planted May 22nd. Experiment ended July 28th. 



The average growth of the wheat plants at the close of the experiments (as 

 denoted by the heights attained) in potting soil was 31 inches. 



In the pots containing the 5 per cent of magnesium sulphate, it was Ti- inches 

 Oq Juno 27th, when the plants died. 



In the soil containing the lime in addition to the magnesium sulphate the 

 grcwth was 25^ inches when the final measurements were made. 



