30 



nature of the soy-bean plant. The values of these various 

 ■units are all given in table I. To avoid ; " ' ~ -^'-■^e rela- 

 tive values secured as noted above, have all been multiplied 

 by 100, and are thus ^iven in the tables fplates I-VITI). 



Table !_ 

 for all exposed stations. 



cli::a7ig 



Avej'age daily physiological temperature index = 55.39 



Average da'ly evaporation index = 16.2 cc. 



Average daily sunshine intensity = 442 calories per sq.cm. 



PLADI'^ : 2-week periods . 



Average daily increment in stem height per plant =3.56 ran. 

 Average daily increment in leaf-pro'-"'"'"-^ ^er plant =112 sq.iri'-: 



PLANT; 4 -week periods . 



Average daily increment in stem height per plant = 3.20 mm. 



Average ddily increment in leaf area per plant = 122 sq, mm. 



Average daily increment in dry v^eight per plant — 6.29 mg. 



""he use of these relative "-.l-Les simplifies the plotting 

 of the graphs upon which the interpretations of such a study 

 as this so largely depend. It also renders possible a direct 

 comparison between the values for an>/ t o cultures irrespective 

 of their date or sta-'"ion. furthermore, it is possible to 

 tell from, the magnitude of the rela'^ive value for any culturs- 

 the extent to rhich the plant or climatic measurement under 

 consideration der>arts from the mean of that measurement for 



