CONTEXTS. 



SURJKCT. PAGE 



!ntro(kictii)ii 241 



Cultivated Plants 241 



C ritical periods of growth 243 



Agricultural meteorology 244 



Personal investigations 245 



Weather and the yield of corn 246 



Four greatest corn Slates 248 



riie correlation coefficient (r) 250 



The critical period for potatoes 255 



Weather and winter wheat 257 



Efi'ect of snow covering on wniter wheat 259 



Snowfall and yield of winter wheat 259 



A few of the problems 260 



The value of such a service 262 



References 264 



