270 
Summary of dates and radiation for winter wheat during ten years, 1872-1881, 
at Montsouris, France—Continued. 
Average total radiation, in 
actinometric degrees, 1874— 
averese Average| 1881. 
Date of sowing. pees | date of Tee 
a ing. Tipening. Flower- | Ripen- : 
| ing | ing Sums. 
| stage. stage. 
| 
September eer teat. s Be ee Oe ee May 16 | July 6 2,562 | 1,344 3, 906 
September2o ok fu fies 2h eee eee ee Cee May 23 | July 12 2,681 | 1,308 3, 989 
OctoboriGee..) i: fe SE Bale) aaae May 29| July 15] 2,840| 1,276 4,116 
OCtODOT HDi a. eos | es ee ee eee Se June 3) July 19 2,817 1,341 4,158 
October 20-2 ene ee eres cen ee SS | June 8 | July 23 2,751 1,380 4,131 
Octo berigias.d ae, Sanh se Oe ee | june 12) Suly 26 | 9 257350) 1eS85. 4,120 
November 3: tees ce es Rel ieee ee oe baa | June 14 | July 28| 2,739 | 1,388 4,127 
November] 0:5 tse seats Fala. Peer sete nea | June17| July 30} 2,731| 1,400 4,131 
November 1 320255 3.8222 22 Re ee June 19 | Aug. 1 | 2,705 | 1, 426 4,131 
Novem beretee Csr. si fi22 foes. ore Se ee June 21 | Aug. 2| 2,704 1,427 4,131 
December 2-2. Fa eS 4. spe | ee eae De June 22 | Aug. 3 2,668 1, 488 4,106 
MeceMbOr Se: ob een aee oe cs oh eae | June 23] Aug. 4| 2,678| 1,442 4,120 
IDecember 15.2 see 4 ae eee ee ee es June 24 | Aug. 5 | 2,690 1,438 4,128 
TD Yorersy acl] of2y ehy-7 Aa wpe etna artless en, Sey tu r=) June 24 | Aug. 6 2,613 1, 482 4,045 
Decemiberi20- oe sere Ses bes OE 3 a ee June 26 | Aug. 7 2,595 | 1, 4238 4,018 
On the average the wheat sown October 13 and ripening July 19 
received the most sunshine during the last two stages and should give 
the best crop. 
The preceding study gives the details of the weather and the 
development of the wheat from 1872 to 1882. Marié-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 following table, assuming that the 
crop ripened at any time between July 6 and August 7 during those 
years. 
Wheat crops and sunshine at Montsouris. 
| Total ae | Total ac- 
. | tinometric tinometric 
oe nett. | deetees ae [MIR degrees 
Year of harvesting. eee during | Year of harvesting. z » during 
per | flowering | ters per "a oweri 
hectare. eels hectare. usual 
and ripen- a and ripen- 
ing stages. ing stages. 
GUO e fae te eC ye rae STN tee Nad esis! OAc Pm as ace emt 24.4 4,154 
1 Res Se Se oe rc ee a by Gas I ae oe WS BCES eee eee oo ee ee 24.6 | 4,351 
Roy ¢ Ub sa Sea ae ee 28.9 ASAGE Nl SG? eee een a eee ee 26.8 | 3,941 
BUD ec seeee erect 21.9 3, 892 = Averacdutpeoed ea 
NST O ie ert see ene se eee 25.0 | 4,416 VORIS): Sosa eee oes 25.9 4, 284 
NO Wict meskes: eee eee 23.0 4,140 | + Average of 4 poor ee 
IRS tae oe nl 19.4. 3,584 | Years .-..---------- 20. 4 3, 827 
1879 tee aes So eee 17.9 3, 703 | 
If we summarize the five years of crops above the mean and the 
four years of crops below the average, as indicated in the preceding 
isco sceip Sotactonss arate 
eS ee 
——_s 
