148 



Ethel McLennan 



IV.— Atmospheric Air + 45 lbs. 



(c) Beginning of experiment 

 End of 1st day 



/. retardation = .542 

 17 .704 



18.5 - .12 



.-. retardation = .584 



Complete Set of Readings for One Seedling-. 



Atmospheric Pressure + 15 lbs. 

 Seedling in Air. 





