3;i 



aesirr-ble, out th«i nevvness of this kind of study rnd the f?ct thpt 

 th" fundementsl principles anci even the terns to be used heve net 

 yet been aeveloped meke jsnything aoproachinf^ p true lorrical sequence 

 quite impossible. 



The various kinas of dsta to be considered will be brought 

 forward in groups corresponding to their sources. The two-week 

 plant data ana the two-week climatic data will first be presented 

 followeu by some ettem.pts to correlate the two groups from the 

 view-point of plant physiology. Then the four-week plant and 

 climptic dpta and their physiological correlation will be pre- 

 sented. These topics will be followed by a special discussion 

 of the aata for the covereu stations end a similar treatm.ent 

 of the oatf for the forest strtion at Baltimore. 



