270 



Summuri/ of dates and radiaiioii for iriiitrr a-heut diiriitf/ ten years. 1872-1881, 

 at Moi'tsouris, France — Continued. 



Date of sowing. 



Average total radiation, in 

 acfinometric degrees, 1874- 

 Average ' 1^81. 

 date of 



Flower- Ripen- 

 ing ing 

 stage. stage. 



September 22 . 

 September 2ft . 



Octobers 



October 13 — 

 October 20.... 

 October 27 .... 

 Novembers... 

 November 10. . 

 November 17. . 

 November 24-. 

 De(.:eniber 1 . . . 

 December 8... 

 December 1.5.. 

 December 22. . 

 December 29. . 



3,906 

 3,989 

 4,116 

 4,1.W 

 4,131 



4.i2n 



4.127 

 4.131 

 4. 131 

 4,131 

 4,lft6 

 4,121) 

 4,128 

 4,04.5 

 4,018 



On the average the Avheat sown October IH and ripening July V.) 

 received the most sunsliine during the hist two stages and shoukl give 

 the best crop. 



The preceding study gives the details of the weather and the 

 development of the wheat from 1872 to 1882. Marie-Davy compares 

 these figures with the annual reports of the total crops actually 

 gathered in the Department of Seine-et-Oise, immediately surround- 

 ing Montsouris, as shown in the folloAving table, assuming that the 

 crop ripened at any time between July 6 and August 7 during those 

 years. 



Wlieat crops and sunshine at Montsouris. 



If we summarize the five years of crops above the mean and the 

 four years of crops below the average, as ijidicated in the preceding 



