578 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XIV. (Continued.) 
Month. 
1844. 
1845. 
1846. 
!Mean temperature of the air. 
Mean temperature of the air. 
Mean temperature of the air. 
At 
Roj'al Ob- 
servatory 
Greenwich. 
At 
St. John’s 
■Wood. 
In 
excess at 
St. John’s 
Wood. 
At 
Royal Ob- 
servatory, 
Greenwich. 
At 
St. John’s 
Wood. 
In , 
excess at 
St. John’s 
■Wood. 
At 
Royal Ob- 
servatory, 
Greenwich. 
At 
St. John’s 
'Wood. 
In 
excess at 
St. John’s 
M’'ood. 
January 
39-1 
36-9 
— 2-2 
38*3 
38-7 
-f 6-4 
43-7 
43-1 
-0-6 
February ... 
35-2 
35-7 
+ 0-5 
32-7 
32-9 
-f 0-2 : 
43-9 
43-7 
—0*2 
March 
41-0 
41*6 
+ 0-1 
35-2 
35-3 
+ 0-1 ' 
43-3 
44-0 
+ 0-7 
April 
51-7 
52-2 
-b0*5 
46-3 
47-5 
+ 1*2 
47*1 
46-8 
-0-3 
May 
52-9 
52-5 
-0-4 
49*4 
49'2 
—0-2 ; 
54-6 
55’6 
+ 1-0 
June 
60-7 
59-9 
— 0-8 
60*7 
60-6 
-O'l ; 
65*3 
65-2 
-0-1 
July 
61-4 
61-0 
— 0-4 
59-8 
59-4 
-0-4 i 
64-5 
63-6 
-0-9 
August 
57-7 
57-4 
-0-3 
57*3 
57-6 
+ 0-3 i 
63-2 
62*5 
-0-7 
September ... 
56-9 
57-4 
-f 0*5 
53*6 
53*8 
-f 0-2 i 
60-1 
60-1 
0-0 
October 
49-5 
49-2 
-0-3 
50-2 
50-1 
-0-1 i 
50-5 
49-9 
-0-6 
November ... 
44-0 
43-3 
-0-7 
45-8 
43-3 
-0-5 1 
46-0 
44-9 
-M 
December ... 
33-0 
33-8 
-pO-8 
41-7 
40-5 
-1*2 
32-9 
32-7 
-0-2 
The observations at St. John’s Wood consisted of one observation of the maximum 
thermometer and of one observation of the minimum thermometer, daily, as v/ell as 
three observations at different times every day of other thermometers. They were 
made by George Leach, Esq., to whom I am indebted for these results. The mean 
values for the month were obtained by the application of corrections from my tables. 
By examining the column of differences, no certain difference exists between the 
temperatures of the air at Greenwich and at St. John’s W’ood. 
Table XV. — Mean monthly temperature of the Air at Fleet Street, London, as 
determined from observations taken by Mr. W. Simms, optician. 
Year. 
January. 
Feb. 
March. 
April. 
May. 
June. 
July. 
August. 
Sept. 
Oct. 
Nov. 
Dec. 
1838. 
O 
0 
O 
O 
O 
O 
O 
O 
O 
52-6 
42-3 
39-9 
1839. 
38-5 
40-4 
40-4 
41*2 
50-8 
61-2 
61-5 
62*0 
57*1 
5M 
43-6 
41-3 
1840. 
41-4 
38-9 
39-8 
52-3 
55-5 
58-9 
59-4 
65-1 
54-8 
48-9 
45-8 
36-6 
1841. 
35-0 
36-2 
1842. 
47-6 
1843. 
42-6 
37-8 
43-6 
46-2 
49-4 
53*4 
58-4 
62-1 
47-3 
45-9 
47-1 
1844. 
43-6 
35-8 
43-5 
49-3 
50-0 
58-2 
60-8 
56‘8 
57-5 
50-4 
44-8 
36-7 
1845. 
41-8 
35-2 
37*0 
46-0 
46-9 
53-6 
58-6 
56-2 
54-3 
51-2 
47-8 
44-3 
1846. 
46-1 
45-4 
47-8 
45-9 
53*9 
62*3 
1848. 
35-9 
44-3 
43*0 
47-9 
57-9 
55-9 
63-4 
57-4 
38-0 
52-1 
44-1 
45-0 
These observations were taken with good instruments, and believed to be taken 
with every care: Mr. Simms very kindly lent me the original observations, from which 
1 have deduced the above values. By comparison with the simultaneous observa- 
tions taken at Greenwich, it seems that the temperature at Fleet Street upon the 
whole year is 0°’7 higher than at Greenwich. 
