286 
and the maximum daily temperatures for the dates of flowering give 
the results in the following table: 
Daily mean tem- | Daily maximum 
Plant. ie Ie eh 3 : belive ane 
Mean. Range. Mean. Range. 
(6h (Et ouG: ou: 
aCe eee eee cree Soe ee ee eee ee oe 10.1 | 4.7_-15.4 15.6 9: 1222210 
Chestnuteo te 55 eae ee eS ee eee INE | Gpieeabeal | 17.9 | 13.5_.26.3 
Wilden ites se ni eet Rae A een ee wee em ee ee | 15.3 | 10.7--19.6 | 22.2 | 15.0_-29.5 
Dindon 25.2022 Bie A catches © eee Lae 16.8 | 12.9..20.8| 23.0 | 16.9..29.9 
Again the accord with the results of previous years is satisfactory, 
but the individual variations are so large as to show that there is no 
clear connection between the epochs of flowering and the mean tem- 
peratures. Next the sums of temperatures received by these plants 
since the last severe cold is computed, assuming 0° C. as the initial 
temperature, with the following results: 
| Sums of daily | Sums of daily 
> mean tem- maximum 
Plant. peratures. | temperatures. 
1884. | 1885. | 1884. | 1885. 
°¢. | °c. | cc. | ce. 
TLC Bete ee ee re ee ete eo ee ee eee ee eee 689 672 | 1,097 | 1,070 
Chestnuts. 0156 oaaie. Se ee een be cas aes | See se eae ee eee 846 841 | 1,345) 1,304 
Rider eee Se Re Fee er Te en eed ee eer ee ine 1,038 | 1,108 | 1,619 1,685 
PIN GON ee sa Soe a = ee ek eee eae nie eee en en ee 1,366 | 1,354) 2,091 | 2,022 
These sums agree well among themselves for the two years, but are 
notably higher than the sums for the four previous years, the excess 
being so much larger than the uncertainty, as deduced from the agree- 
ment of the numbers among themselves, that we can scarcely con- 
sider that such sums as these represent the true influence of climate 
on these plants. 
The dates of flowering and harvest of rye and winter wheat at 700 
or 800 stations give the following results: 
The mean temperatures at the date of flowering are, for rye, in 1884, 
14° C., and 1885, 12.2° C.; for winter wheat, in 1884, 15.1° C., in 
1885, 16.4° C. These figures agree well with the previous four years, 
but the individual discrepancies show that there is no simple relation 
between the flowering of these plants and the mean temperature. 
Again, the sums of temperatures are computed from the Ist of 
December; 5° C. is subtracted from all the mean daily temperatures 
and the sums of the positive remainders are given. Since in previous 
years 6° C. has been adopted, whereas the evidence points toward a 
lower figure, therefore Angot now gives the results of a recomputa- 
