3* 
Studies in Phcenology 
I have also given the 1918 temperatures as being of interest in 
connexion with the comparison of the flowering dates of that year 
with those of 1920. 
1918 
1918 
Week 
Week 
Mean 
Deviation 
from 
normal 
Week 
Week 
Mean 
Deviation 
from 
normal 
no. 
ending 
temp. F. 
no. 
ending 
temp. F. 
1 
Jan. 5 
34 'i 
-5*6 
27 
July 6 
63*8 
+ i -9 
2 
12 
36-5 
-2-5 
28* 
13 
58-i 
-i -9 
3 
19 
39-6 
- o-i 
29* 
20 
60-3 
- 0*4 
4 
26 
50-1 
+ 9-8 
30 
27 
60-2 
- 2-0 
5 
Feb. 2 
44-6 
+ 3’9 
3 i 
Aug. 3 
64-1 
4 -1*6 
6 
9 
48-5 
+ 8-i 
32 
10 
62-7 
+ 0-5 
7 
16 
46-7 
+ 6*2 
33 
17 
62-9 
+ i-i 
8 
23 
40-9 
+ 0-7 
34 
24 
64-0 
+ 2-9 
9 
Mar. 2 
4°*9 
o-o 
35 - 
3 i 
58-3 
-1-6 
10 
9 
39 -o 
- 2-3 
36 
Sep. 7 
58-9 
-0-2 
11 
16 
45 *i 
+ 2-5 
37 
14 
55*5 
- 2-7 
12 
23 
47-0 
+ 4‘3 
38 
21 
58*1 
+ 1-4 
13 
30 
46-3 
+ i -9 
39 
28 
53*2 
-i *7 
14 
Apr. 6 
46-1 
+ 0-2 
40 
Oct. 5 
48-9 
- 4 *o 
15 
13 
46-8 
+ o *3 
4 i 
12 
52*0 
+ o*8 
16 
20 
40*1 
- 7*7 
42 
19 
46'5 
- 3*4 
17 
™ 27 
49-6 
+ 0*1 
43 
26 
47*7 
-0-2 
18 
May 4 
499 
- o*6 
44 
Nov. 2 
52-0 
+ 4*5 
19 
11 
54-2 
+ 2-0 
45 
9 
45*5 
- 1*0 
20 
18 
57-3 
+ 3*5 
46 
16 
43-3 
-o-8 
21 
25 
62’4 
+ 7-3 
47 
23 
38*7 
-4.4 
22 
June 1 
6 o’9 
+ 3*7 
48 
30 
46*6 
+ 3-6 
23 
8 
6 i*o 
+ 2*8 
49 
Dec. 7 
5 i -7 
+ 9*7 
24 
15 
56*5 
-i *5 
50 
14 
49*8 
+ 8-o 
25 
22 
55’3 
- 4*3 
5 i 
21 
44*5 
+ 3*7 
26 
29 
57 '° 
-4-4 
52 
28 
42-0 
+ i -7 
The most obvious feature in the conditions ruling in 1920 is the 
relatively high temperature of the winter and spring. Thus from 
Jan. 4 to March 27, i.e. 12 observations, there are only two cases of 
temperatures below normal, viz. Feb. 28, — 0*2 F. 1 and March 13, 
— 0-7; the temperatures above normal varying from + i*i to + 7*9. 
In the list (Table II) which follows, the first column gives the 
locality of the observation: thus the plants marked C were found in 
Cambridgeshire; those marked S were found near Gomshall in 
Surrey. The remainder (not marked with a letter) were found near 
Brookthorpe in Gloucestershire. Then follow (in separate columns) 
1 By - 0*2 F. is meant a fifth of a degree below the daily mean temperature. 
The weeks are described by their later date, thus Feb. 28 means the week 
Feb. 21-28. 
