16 



moist atmospheres, in the Instances referred to the 

 plants growing in the atmosphere saturated ^/rith moisture 

 were more or less distorted, the stems ibeing somevmat 

 Tcnotted or twisted. 'it is probalsle that the excessive 

 strain due to the increase in turgor, as a result of the 

 checlcing of transpiration, caused the tissues to assume 

 somewhat abnormal shapes. 



ThPire i^as a preceptible difference in the height of 

 the plants grown under the two conditions as is shown by 

 the figures in table III. Com and sunflowers reached 

 their greatest height in the dry atmosphere, while peas, 

 wheat and buclcwheat were taller where moist conditions pre- 

 vailed. The increase in height was in every instance 

 coincident with an Increase in total dry matter except in 

 the case of bucRwheat. Tith the exception of com this 

 same relation exists between the height and green weight. 



It will be seen that the amount of water transpired 

 exerted a raarlced influence on the composition of the 

 plants. In every instance the percentage of water was 

 greater in the plants grown in the moist atmosphere. We 

 would ex-oect this to be the case as the turgidity of the 



