TABLE V. Mean Temperature of every day m the month of May , as deduced from the observations taken on that day at the Gardens of the Royal Horticultural Society at Chiswick in the years 1826-1869 
and extremes of Mean Temperature for faery day within the same period. 
MAY. 
Lowest and Highest 
Mean Daily Temperature 
in 44 Years 
slig 
Ilf. 
L iS’6 
1827 
1828 
1829 
1830 
1831 
1832 
•833 
183+ 
1835 
1836 
1837 
1838 
1839 
1840 
1841 
1842 
1843 
1844 
184; 
1846 
11847 
1848 
1849 
1850 
I8 S I 
1852 
1853 
I8J4 
>855 
1856 
1857 
1858 
1859 
i860 
1861 
1862 
1863 
1864 
i86j 
1866 
1867 
1868 
1869 
r 
Lowest 
mete* 
1 
432 
63-4 
4 I 7 
570 
55*9 
58*2 
58*2 
56*2 
546 
56*1 
sl-6 
500 
48*2 
49-8 
42-0 
46-9 
46*1 
53*6 
506 
43*2 
39*1 
476 
45*5 
46*4 
63*6 
616 
62*9 
42*9 
56*7 
516 
37*4 
52*5 
58*2 
43*9 
$ 1*0 
37*4 
1866 
63*4 
1827 
266 
49-5 
51*2 
58*2 
47*0 
49*0 
55*4 
41*0 
(46*3 
42*4 
54*8 
516 
47*3 
40*9 
47*1 
47*5 
466 
54*2 
52*8 
54*4 
48*7 
576 
54*3 
416 
536 
57*4 
48*9 
5*‘* 
40*9 
i856 
61*3 
1839 
20*4 
\ 43 6 
607 
547 
531 
54-6 
55-8 
52*7 
58-6 
56-7 
48-9 
48-4 
54*5 
58*8 
56*4 
58*4 
46*3 
56*9 
53*4 
546 
48*9 
60*4 
45*5 
53*2 
59*2 
50*1 
^26 
44*1 
51*8 
61*9 
48*8 
43*1 
44*9 
45*6 
48*6 
51*7 
50*8 
48*0 
55*0 
53*7 
60*1 
42*6 
55*1 
62*3 
51*7 
$Z‘Z 
42*6 
(1861 
118(56 
626 
1868 
19*7 
* 1 -t' 3 ' 9 
47*8 
56*2 
62*9 
47*5 
41*0 
45*8 
49*2 
61*5 
40*1 
41*8 
43*7 
47*3 
49*0 
47*7 
42*9 
63*3 
67*8 
48*3 
58*4 
43*5 
57*6 
53*3 
42*2 
40*1 
1855 
686 
1834 
276 
J 45 2 
545 
522 
551 
612 
46-9 
54-8 
609 
600 
54-7 
48-2 
46*9 
55*1 
61*6 
580 
56*2 
54*7 
54*2 
57*1 
46*5 
56*4 
48*3 
57-9 
59*4 
49*0 
45*3 
47*7 
51*1 
48*2 
44*1 
43*9 
44*5 
48*3 
48*7 
47*0 
45*6 
65*1 
56*5 
51*4 
62*0 
49*6 
59*3 
48*9 
48*9 
S z*5 
43*9 
1856 
65-1 
1862 
21*2 
428 
525 
531 
53-2 
664 
40-1 
590 
581 
62-7 
53-2 
49-8 
46-8 
49*9 
56*4 
58*0 
54*6 
52*9 
42*2 
57*2 
45*4 
54*4 
50*5 
59*3 
52*6 
42*6 
44*9 
48'3 
44*6 
516 
52*1 
46*0 
45*6 
50*3 
48*8 
45*2 
44*1 
63*1 
64*7 
65*9 
£>6*0 
53*5 
65*7 
472 
55*2 
52*9 
40*1 
1831 
66*4 
1830 
26*3 
44-9 
58*2 
43*9 
55*2 
570 
60*5 
46*3 
45*4 
49*1 
54*8 
37*9 
536 
51*3 
41*1 
44*9 
44*6 
57*2 
52*1 
44*0 
67*3 
54*0 
55*4 
51*3 
53*5 
64*8 
516 
55*8 
5 2 '4 
37*9 
1853 
64*8 
1867 
266 
% 48-6 
434 
523 
53-8 
583 
43-7 
56-0 
58-2 
63-6 
576 
50-4 
47*1 
60;4 
58*5 
60*5 
53*7 
52*3 
44*8 
57*2 
42*8 
55*8 
54*1 
57*7 
46*7 
44*5 
52*1 
59*2 
41*4 
48*6 
43*5 
44*3 
47*4 
47*5 
54*4 
55*3 
38*4 
54*7 
49*1 
53*8 
57*0 
55*3 
676 
556 
50*8 
54*2 
38*4 
1861 
676 
1867 
28*6 
9 51-3 
460 
535 
54*4 
512 
48-8 
43-6 
650 
62-7 
59-4 
49-5 
41*0 
59*9 
47-5 
59*8 
56*3 
46*5 
47*4 
62*3 
47*3 
60*6 
556 
59*3 
46*8 
44*3 
53*8 
58*6 
43*5 
48*2 
48*3 
46*7 
51*0 
51*1 
51*7 
51*7 
41*4 
52*6 
52*6 
45*4 
566 
54*9 
62*6 
58*1 
52*9 
5*‘3 
416 
1837 
656 
1833 
24*0 
la 53-8 
496 
553 
575 
49-3 
47-1 
42-8 
59-6 
58-8 
55-4 
48-9 
41*5 
45*6 
47*1 
60*8 
57*8 
49*3 
49*6 
54*1 
47*1 
556 
61*9 
57 *9 
46*1 
516 
56*9 
54*7 
44*6 
49*5 
53*3 
54*0 
51*8 
52*5 
47*4 
56*7 
45*3 
54*3 
47*3 
51*3 
47*3 
56*0 
64*6 
58*0 
57*3 
5*‘4 
41*5 
1837 
: 64*6 
1867 
23*1 
>■ 
510 
582 
56-7 
47-6 
49-0 
48-3 
611 
63-1 
570 
54-9 
47*3 
47*0 
47*1 
53*2 
62*0 
55*2 
48*9 
56*6 
49*3 
53*3 
54*3 
63*5 
44*2 
54*5 
54*2 
52*1 
45*3 
49*2 
47*4 
55*5 
55*0 
51*2 
50*1 
57*3 
45-9 
50*8 
64*2 
49*3 
48*2 
52*0 
59*7 
57*3 
52*8 
5*6 
44*2 
1849 
63*5 
1848 
196 
* ! m 
49-2 
582 
54-8 
51-7 
52-5 
44-3 
661 
59-2 
55-6 
55-9 
45*7 
51*9 
47-1 
54*8 
57*3 
46*7 
56*8 
57*2 
50*7 
58*2 
55*8 
62*2 
51*5 
5Q*9 
54*3 
53*5 
49*5 
52*0 
40*8 
536 
58*8 
47*7 
52*3 
58*7 
49-8 
52*6 
52*8 
486 
50*6 
47*6 
54*2 
58*4 
51*3 
53’° 
40*8 
1855 
66*1 
1833 
253 
506 
57-4 
554 
47-6 
540 
44-7 
60-1 
56-6 
54*5 
57-4 
47*7 
46*0 
49*7 
57*3 
55*8 
54-3 
53*9 
60*4 
51*8 
58*1 
56*2 
62*1 
53*0 
49*5 
50*3 
56*0 
47*8 
54*2 
43*7 
53*2 
60-8 
52*2 
51*1 
556 
42*0 
51*1 
53*1 
566 
52*8 
406 
47*5 
566 
516 
5*7 
40*8 
1866 
1 62*1 
184$ 
21*3 
' 14 4$ 6 
518 
581 
58-4 
53-6 
48-5 
47-4 
63*3 
58-6 
48-6 
56-8 
50*2 
45*3 
40*4 
58*2 
52*6 
55*8 
59*8 
57 *5 
50*4 
506 
55*8 
65*4 
56*8 
49*6 
47*5 
54*2 
51*2 
57*3 
45*6 
49*5 
57*5 
54*6 
51*5 
53*7 
54*4 
50*1 
54*4 
60*2 
49*1 
47*0 
46*6 
59*2 
61*2 
53’ 1 
40*4 
1839 
1 65*4 
1848 
256 
15 50 2 
559 
61-1 
60-6 
556 
51-1 
46-3 
71-0 
61-0 
52-9 
586 
49-5 
42*5 
41*2 
54*2 
58*1 
56*4 
56*2 
50*8 
55*8 
50*8 
58*0 
65*7 
56*1 
41*8 
48*6 
54*4 
53*9 
55*6 
45*7 
50*6 
63*4 
556 
53*7 
576 
58*4 
50*3 
55*2 
61*3 
49*4 
45*9 
45*4 
626 
53*1 
54" 1 
41*2 
1839 
1 716 
1833 
296 
16 57-8 
590 
623 
54-3 
59-6 
56*1 
48-1 
67-8 
58-9 
52-9 
58-3 
48*7 
44*3 
44*0 
56*3 
60*1 
57*1 
55*2 
54*1 
54*4 
536 
57*8 
65*3 
58*5 
47*4 
53*3 
006 
58*8 
49*7 
44*4 
52*2 
64*4 
55*8 
54*4 
53*5 
62*7 
58*1 
55*5 
62*9 
62*1 
48*4 
46*6 
616 
50*3 
55’4 
44*0 
1839 
67*8 
1833 
23*8 
17 60 o 
610 
61-5 
56-1 
631 
59-3 
46-8 
70-3 
49-9 
570 
58-8 
58*5 
47*2 
48*5 
53*8 
56*4 
54*4 
52*9 
47*6 
46*8 
496 
57*6 
63*4 
55*9 
54*3 
54*0 
66*5 
56*0 
52*0 
47*5 
50*8 
59*2 
55*3 
51*1 
53*1 
48*1 
59*3 
51*8 
63*3 
54*2 
50*9 
49*3 
58*1 
526 
54'9 
46*8 
{}|£ 
70*3 
1833 
23*5 
1* 62-7 
595 
577 
55-6 
621 
60-8 
49-5 
63-2 
51*0 
61*9 
58-8 
46*6 
48*0 
568 
54*3 
56*6 
54*2 
46*5 
43*8 
48*8 
53*2 
58*1 
57*5 
55*5 
54*5 
52*4 
59*1 
56*0 
49*2 
51*8 
50*4 
61*3 
54*9 
53*5 
53*6 
46*1 
60*8 
53*1 
65*2 
52*6 
556 
536 
616 
55*2 
55'* 
43*8 
1844 
65*2 
1864 
21-4 
«9 61-0 
62T 
582 
57-6 
61-1 
59-1 
54-6 
59-6 
53*5 
61*2 
52*0 
43*5 
53*8 
59*8 
49*8 
52*4 
53*0 
51*9 
51*1 
48*5 
56*3 
57*2 
54*4 
56*9 
57*7 
50*5 
59*5 
58*3 
49*2 
57*4 
54*4 
616 
51*9 
57*3 
54*6 
48*8 
60*7 
46*6 
66*4 
56*2 
57-1 
576 
71*9 
486 
556 
43*5 
1837 
71*9 
1868 
28*4 
» j 55 9 
60-2 
55-7 
59-8 
59-6 
62-0 
55-8 
59-6 
55-6 
55-2 
58-3 
44*6 
53*8 
63*8 
50*3 
52*2 
54*9 
54*3 
51*1 
49*8 
520 
556 
52*6 
53*3 
56*8 
52*8 
57*8 
52*8 
57*1 
56*9 
55*1 
60*7 
56*8 
52*8 
58*3 
60*2 
58*7 
49*2 
646 
61*7 
56*8 
58*7 
59*5 
486 
56*0 
44*6 
1837 
64*6 
1864 
20*0 
to | 58 0 
64-6 
570 
56-7 
588 
600 
60-2 
63-3 
58-8 
51-6 
53-8 
42*6 
57*3 
58*2 
47*1 
59*4 
58*3 
54*5 
52*9 
48*3 
56*3 
57*8 
60*0 
59*0 
59*5 
55*9 
53*9 
51*9 
56*0 
49*4 
61*2 
56*8 
61*9 
53*2 
59*6 
64*9 
52*4 
49*1 
54*5 
69*1 
53*1 
48*9 
58*1 
51*1 
56*3 
42*6 
1837 
69*1 
1865 
26*5 
to 60-8 
61-0 
52-5 
572 
57-4 
58-5 
57-6 
62-5 
57-0 
59-5 
50-7 
42*6 
53*4 
46*8 
49*7 
59*6 
54*7 
53*6 
55*8 
50*5 
57*9 
63*3 
616 
55*0 
56*2 
60*6 
54*5 
54*1 
54*3 
48*7 
54*5 
55*2 
56*1 
51*5 
59*8 
61*8 
55*1 
48*1 
596 
616 
52=9 
41*1 
58*4 
51*1 
557 
41*1 
1867 
63*3 
1847 
22*2 
*3 j 60-9 
58'5 
58-5 
61-3 
617 
63-6 
586 
63-6 
59-6 
60-6 
52-0 
45*1 
53*0 
53*2 
58*9 
60*9 
54*1 
57*5 
54*1 
50*2 
586 
70*9 
56*1 
55*7 
58*0 
54*4 
51*8 
56*0 
51*0 
51*0 
55*0 
576 
546 
54*5 
61*4 
65*6 
56*3 
48*8 
51*2 
62*6 
51*3 
896 
556 
54*5 
5^*3 
39*8 
1867 
70*9 
1847 
311 
24 |j 59 o 
538 
600 
57-6 
62-8 
63-4 
60-8 
64*1 
60-2 
621 
50-4 
46-6 
53*0 
48*2 
61*3 
64*5 
52*8 
56*2 
54*3 
53*5 
61*4 
58*8 
59*7 
62*0 
58*6 
58*4 
56*2 
60*7 
52*0 
60*2 
54*6 
55*9 
54*1 
56*9 
60*2 
55*3 
58*8 
49*3 
48*9 
577 
46*8 
44*2 
54*8 
57*9 
56*6 
44*2 
1867 
'64-5 
1841 
20-3 
S oo 3 
536 
57-7 
531 
59-1 
62-3 
65-9 
52-6 
56‘3 
50-9 
54*2 
46*0 
55*5 
64*0 
55*1 
56*7 
51*2 
49*8 
63*3 
55*6 
62*1 
60*8 
56*5 
59*4 
55*3 
616 
51*4 
62*7 
54*9 
616 
49*4 
60*9 
59*6 
56*0 
60*1 
56*3 
466 
1839 
65*9 
1833 
19*9 
* 56-8 
568 
611 
56-4 
56-7 
60-6 
61-1 
55*1 
52-4 
51-8 
50*9 
52*7 
51-2 
53*3 
52*3 
68*7 
56*0 
54*6 
48*4 
45*8 
576 
57*1 
65*3 
60*4 
56*5 
52*8 
50*6 
62*7 
53*3 
70 6 
59*1 
57*8 
516 
59*7 
54*1 
56*3 
59*6 
49*9 
46*3 
62*9 
57*4 
55*4 
58*6 
58*3 
56*3 
456 
1845 
70*6 
, 1855 
248 
>7 59-9 
600 
584 
58-4 
56-6 
56-5 
56-3 
57-6 
55-6 
51-6 
50*9 
54*9 
54*0 
55*4 
56*8 
71*0 
59*6 
55*5 
48*3 
56*8 
58*4 
676 
54*0 
63*1 
56*9 
52*8 
50'7 
63*1 
49*3 
63*3 
58*8 
59*7 
56*4 
60*0 
53*0 
60*2 
58*3 
57*3 
506 
63*6 
54*8 
57*3 
59*5 
52*5 
57*4 
48*3 
1844 
716 
; 1841 
22-7 
; 58 4 
61*3 
607 
58-9 
54-6 
59-6 
61*0 
59-8 
51-5 
50-5 
55*8 
58*6 
53*5 
53*1 
62*1 
66*1 
56*3 
54*3 
526 
58*4 
56*0 
74*4 
58*4 
55*3 
54*7 
58*9 
52*0 
55*0 
516 
01*4 
55*3 
62*7 
54*3 
57*5 
48*4 
52*7 
55*9 
60*5 
54-9 
59*3 
56*2 
60*4 
63*4 
43*3 
S 6*8 
43*3 
1869 
74*4 
1847 
311 
*9 [ 51-9 
57*9 
61*0 
63*4 
63*1 
46*4 
49*1 
51*1 
57*8 
62*8 
65*5 
60*6 
59*6 
58*7 
46*9 
53*2 
50*8 
47*0 
52*3 
57*1 
61*4 
62*0 
51*1 
58*7 
63*5 
636 
49*3 
626 
546 
57*3 
65*7 
44*4 
56*5 
44*4 
1869 
65*7 
1868 
21 3 
; 52 3 
60*9 
62*3 
60*4 
54*8 
51*8 
51*9 
50*1 
53*3 
59*8 
55*9 
616 
65*1 
51*4 
577 
43*4 
1855 
65*1 
{1868 
21*7 
61*6 
57*6 
63*3 
68*2 
61*4 
60*7 
50*5 
56*5 
65*7 
64*7 
57'3 
63*3 
60*0 
56*7 
48*3 
52*0 
56*6 
44*7 
46*5 
56*0 
69*1 
62*4 
51*1 
61*7 
59*4 
56*8 
52*9 
60*2 
59*2 
61*2 
596 
48^5 
57*6 
44*7 
1855 
69*1 
1858 
24*4 
563 
57-3 
55-8 
570 
54-6 
53-2 
61-0 
57’8 
541 
- 
49*5 
53*3 
537 
56*8 
58-9 
55, 
53, 
53*7 
50*2 
56*7 
5,3 
59*0 
55*7 
51*9 
'52*5 
52*7 
52*5 
51*8 
49*9 
50*6 
54*9 
53*1 
53*8 
54*3 
526 
56*8 
52*9 
54*9 
56*7 
51*1 
S ,7 
58*5 
51'5 
54‘4 
feMean Temperature of the coldest day in May in the years 1826 to 1869 was 37°-4, and it took place on the 1st day in the year 1866. 
Mean Temperature of the hottest day in May in the years 1826 to 1869 was 74°-4, and it took place on the 28th day in the year 1847. 
^difference between these numbers is 37 o ‘0, and it represents the extreme difference between the Mean Temperature of two days in the month of May 
I T 
The day of the month whose Mean Temperature has been subjected to the greatest difference was the 23rd ; in the year 1867 its Mean Temperature was 
39 0, 8; and in the year 1847 it was 70°*9; the difference between these numbers is 31°*1.* 
The day of the month whose Mean Temperature has been subjected to the least difference was the 11th; in the year 1849 its Mean Temperature was.44°*2 ; 
and in the year 1848 it was 63°*5, the difference between these numbers is 19°*3. 
* Also the 28th in the year 1869: Mean Temperature 43°*3; and in the year 1847 74 0, 4; the difference between these numbers is 31°*1- 
