INFLUENCE OF TEMPERATURE ON THE PROGRESS OF VEGETATION. 83 
Avusact in Derk TeureraTuRE si del ag 
le reagent, (\itbeaiMonrss) | AVERAcm 
1884 16 days before. 43° +3 
1882 TAs 5 om 42° ray 
1878 6m % < 42° ome 
1883 Ba, ¥ 39° a 
1880 rey es 41° Sag 
1885 ons a 41° sug 
1881 6 ,, after. 37° -3 
1887 Op-9: ¥ 38° are 
1886 Titec i 37° eta 
1879 Tense RBenee 37° a 
The temperatures given are from the observations taken at 
Burton and published in this Society’s Annual Reports ; those for 
1878 and 1879 were not so published, and are taken, the Jatter 
from a sheet which was printed separately by Mr. C. U. Tripp, 
F. R. Met. S., and the former from notes with which he has 
kindly supplied me for this purpose. 
This table shows a difference of 36 days between the most 
forward and the most backward year. In the case of some 
plants the difference was more than this, for instance, I have 
seen the Wild Hyacinth in flower as early as 4th April, while in 
1887, I did not see it out till 22nd May, or seven weeks later ; on 
the other hand, those plants which do not flower till the summer 
vary very little in their time of flowering, on account probably of 
their not being exposed to such great differences of temperature 
as those which flower in the early months. 
It will be seen from this table that the order in which the years 
stand in the forwardness of vegetation corresponds in a great 
measure, though not completely, with that of the mean tempera- 
tures ; the earliest years, 1884, 1882, and 1878, being also those 
which had the warmest early months, and the latest season, 1879, 
having, with 1881 and 1886, the coldest early months. 
The two principal points in which the order of temperatures 
