( VII ) 
THE Royal Observatoet, Greenwich, foe the Year 1887. 
Dkcuee 
READIXa 
Weight 
OF A 
Cubic 
Foot of 
AlK 
ReADIXG of TirEIlMOMETEH 
OX GR-^JiS 
OF 
Humidity 
OP 
Babometer 
JtAIX 
Daily 
hori- 
zontal 
Number of 
nights it was 
1887. 
Mean 
Saturation = 100 
Diff. 
from 
aver- 
age 
of 46 
years 
Mean 
Diff. 
from 
1 verage 
of 46 
years 
Mean 
Difl. 
from 
aver- 
age 
of 46 
'ears 
Ci 
3 
o 
a 
<< 
Diff. 
from 
iverage 
of 72 
years 
move- 
ment 
of the 
air 
At or below 
30° 
Between 30° 
and 40° 
o 
o 
OJ 
1> 
o 
.Q 
■< 
Lowest ] 
reading 
at 
night 
Highest 
reading 
at 
night 
Months 
92 
+ 2 
in. 
29-831 
in. 
+ -084 
grs. 
558 
grs.. 
+ 4 
in. 
1-15 
in. 
-0-70 
Miles 
238 
22 
9 
o 
14-9 
o 
38-0 
Jan. 
84 
- 1 
30-145 
+ -356 
561 
+ 8 
0-53 
-105 
315 
18 
9 
1 j 
13-7 
420 
Feb. 
83 
0 
29-891 
-H-138 
557 
+ 7 
185 
-0-16 
288 
19 
12 
0 
14-6 
35-0 
Mar. 
86 
n 
+ -193 
559 
+ (i 
Sum 
3-03 
Sum 
Mean 
Sum 
59 
Sum 
30 
Sum 
1 
Lowest 
13-7 
Highest 
420 
UtTcci lis 
75 
- 5 
29-818 
-f- 072 
548 
+ 5 
1-75 
-0^01 
343 
15 
15 
0 
19-1 
38-5 
April 
80 
+ 1 
29-834 
+ •047 
542 
+ 2 
172 
-0-36 
289 
4 
18 
9 
23-3 
470 
May- 
72 
— O 
30-013 
-f -207 
533 
+ 1 
1-23 
-0-74 
244 
0 
7 
23 
33-2 
51-7 
June 
76 
A 
4. -1 OS 
T X VO 
+ ^ 
Sum 
4' 70 
Sum 
1-11 
— i. J. 1 
Mean 
Sum 
19 
Sum 
40 
Sum 
32 
Lowest 
19-1 
Highest 
51-7 
64 
-11 
29-866 
+ 069 
525 
-3 
1-29 
-1-22 
248 
0 
3 
28 
37-3 
58-5 
July 
66 
-10 
29-807 
+ •023 
528 
-1 
2-34 
-0-01 
210 
0 
8 
23 
33-4 
55-9 
Aug. 
80 
- 1 
29-769 
-•039 
536 
+ 3 
2-22 
-021 
283 
3 
15 
12 
27-0 
51-7 
Sept. 
70 
— 7 
29-811 
+ •018 
530 
0 
Sum 
5-85 
Sum 
-1-44 
Mean 
Sum 
3 
Sum 
26 
Sum 
63 
Lowest 
27-0 
Highest 
58-5 
Hffin n s 
±lL CU Ho 
82 
- 7 
29-916 
+ •208 
549 
+ 9 
1-03 
-1-76 
255 
19 
5 
7 
18-0 
47-9 
Oct. 
89 
- 1 
29-530 
-•212 
547 
-1 
3-78 
+ 1-44 
281 
11 
16 
3 
15-5 
42-2 
Nov. 
85 
_ e 
29-676 
-113 
543 
-9 
1-47 
-0-52 
308 
20 
10 
1 
16-7 
40-8 
Dec. 
85 
- 4 
29-707 
-039 
546 
0 
Sum 
6-28 
Sum 
-0-84 
Mean 
281 
Sum 
50 
Sum 
31 
Sum 
11 
Lowest 
15-5 
Highest 
47-9 
Means 
siguiSes above the average, and that the minus sign ( — ) signifies below the average. 
