CORRECTIONS OF OBSERVATIONS OF TEMPERATURE. xix 
TABLE of Corrections to be applied to Observations of the Temperature of the 
Air at any Hour, in order to get the Mean of the Day. 

Mak. Jan. Feb. | March.| April. | May. | June. | July. | Aug. | Sept. | Oct. | Nov. | Dee. 
[J | | | | | | 




0 —2.4 | —3-2 | —4.9 | —5-9 | —5-0 | —5-7 | —5-2 | —6-1 | —6-4 | —4-7 | —3-1 | —2.2 
1 —3-1 | —3-9 | —5-3 | —6-5 | —5-6 | —6-4 | —5-3 | —6-5 | —7-3 | —5-0 | —3-5 | —2.5 
2 —3:0 | —4-0 | —5-4 | —6-7 | —5-6 | —6-0 | —5-2 | —6-8 | —7-5 | ~—5-0 | —3.3 | ~2.2 
3 —2-2 | —3-2 | —5-2 | —6-5 | —5-6 | —5-4 | —5-1 | —6-5 | —7:0 | —4-3 | —2.3 | —1-5 
4 —1-3 | —2-6 | —4-1 | —5-6 | —4-9 | —4-8 | —4-5 | —5-9 | —5-8 | —2-8 | -1-0 | —0.4 
5 —0-5 | —0-9 | —2.8 | —4-1 | —3-8 | —4-3 | —3-5 | —4-4 | —4-1 | —1-1 | —0-0 | —0-1 
6 +0-1 | —0-1 | —0-8 | —2-5 | —1-8 | —2.7 | —2.4 | —2-7 | -1-8 | —0-0 | +0-4 | +0.4 
i +0-3 | +0-3 | +0-3 | —0-2 | —0-6 | —1-:3 | —0-7 | —0-6 | —0-0 | +0-7 | +0-5 | +0-4 
8 +0-5 |+0-7 | +1-1 | +1-0 | +1-6 | +0-7 | +1-1 | +1-1 | +1-0 | +1-2 | +0-7 | +0-5 
9 | +0-5 |+1-0 | +1-6 | +2-3 | +2-3 | +25 | +2.2 | +2-3 | +2.3 | +1-8 | +0-8 | +0.7 
10 +0-4 | +1-2 | +2-1 | +3-4 | +3-0 | +3-7 | +3-3 | +3-5 | +3-1 | +1-9 | +1-0 | +0.8 
11 +0-3 |+1-5 | +2-4 | +4-1 | +3-8 | +4-6 | +3-7 | +4.2 | +3-6 | 41-9 | +0-9 | +0.9 
12 +1-2 | +1-7 | 42-8 | +45 | +4-3 | +5-3 | +4-5 | 4+4-5 | +46 |+2-2 | 41-0 | +0-7 
13 +1-4 | +4+1-8 | +3-1 | +5-0 | +4-4 | +5-7 | +5-1 | +5-1 | +5-1 | +2-2 | 41.0 | +0-5 
14 +1-4 | +2-1 | +3-1 | +5-3 | +5-1 | +6-0 | +5-3 | +5-5 | +5-4 | +2-5 | +1-3 | +0-5 
15 4+1-4 |+2-1 |+3-3 | +5-4 | +5-6 | +6-3 | +5-7 | +5-9 | +5-7 | +2-6 | +1-3 | +0-7 
16 +1-1 | +2-0 | +3-7 | +5-8 | +5-5 | +5-8 | +5-4 | +6-0 | +6-0 | +2-7 | +1-5 |+1-0 
17 +1-3 | +1-7 |+4-0 | +5-5 | +45 | +4-9 | +4-3 | +5-8 | +60 | +3-2 | +1-4 | 41-1 
18 +1-2 }+1-8 | +3-9 | +42 | +2-8 | +2-9 | +2-4 | +43 | +5-4 | +2-9 | +1-5 
19 +1-2}+2-0 | +3-0 | +2-3 | +1-0 | +1-1 | +0-6 | +2-3 | +3-2 | +2-8 | +1-5 
20 +1-2 | +1-7 | +1-2 | +0-2 | —0-7 | —1-0 | —1-2 | +0-0 | +0-4 | +1-2 | +1-5 
2 +0:-7 | +0-2 | —0-7 | —2-1 | —2-3 | —2-7 | —2-4 | -—2.1 : 
22 —0-1 | —1-5 | —2-5 | —4-0 | —3-4 | —3-9 | —3-5 | —3-9 
— 4-0 




















From this Table it is easy to find what correction ought to be applied to the 
mean temperature of the observation hours in order to obtain the mean of the day. 
During the year 1847 there were five observation hours, viz :—20*, 235, 25, 
5*, 8°, Gottingen mean time, or approximately 7 A.m., 10 a.m.,1P.m.,4 P.m., 7 P.M., 
Makerstoun mean time. And consequently the following corrections require to 
be applied to the mean of these observations in order to find the mean temperature 
of the day :— 
Jan. Feb. March April May June July Aug. Sept. Oct. Nov. Dec. 
—06 —11 -17 —28 -—27 -31 -27 -—29 -—28 -13 -0-7 —05 
During the years 1848 and 1849, and January 1850, there were only two 
hours, viz. 23", 5", Gottingen mean time, corresponding nearly to 10 a.m. and 4 P.M. 
Makerstoun mean time, and here the following corrections require to be applied :— 
Jan. Feb, March April May June July Aug. Sept. Oct. Nov. Dee, 
—07 —20 -33 -48 -4.1 -—-43 -40 —49 -—50 —26 -—1:0 —0-6 
From February 1850 till the end of the same year there were four observation 
hours, at 7 A.M., 10 A.m., 1 p.m., 4 P.M. Makerstoun mean time approximately, and 
the following are the corrections applicable :— 
MAG. AND MET. OBS. 1847 To 1855. e 
