REPORT OF THE CHEMIST. 



139 



DIAGRAM SHOWING AVERAGE GROWTH OF PEA PLANTS. 



Continuous line — Plants in potting soil. 



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



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



MAY 



JUNE 



JULY 



Pease. — Seed planted May 11th. Experiment ended July 29th. 



The average growth in potting soil was 45J inches at the close of the experi- 

 ment. 



In the soil containing 5 per cent of magnesium sulphate \\ inches only on 

 May 28th, when the plant died. 



In the soil containing both magnesium sulphate and lime the average height waa 

 Z^\ inches. 



