Ixxxiv 
General Results of the Makerstoun Observations. 
METEOROLOGICAL RESULTS. 
Temperature of the Air. 
Table 72. — Monthly Means of the Temperature of the Air at Makerstoun, for the 
Years 1841-9. 
Month. 
1841. 
1842. 
1843. 
1844. 
1845. 
1846. 
1847. 
1848. 
1849. 
i 
1842-9. 
jjiuii till y 
Variations. 
January 
33-90 
38-43 
37-35 
34-71 
41-06 
33-70 
32-54 
36-68 
36-05 
- 9-98 
February 
38-74 
32-92 
32-48 
32-96 
42-52 
33-85 
38-67 
39-86 
36-50 
- 9-53 
March 
41-06 
39-40 
38-36 
35-39 
39-96 
40-77 
39-99 
40-81 
39-47 
- 6-56 
April 
45-32 
44-79 
46-77 
44-33 
42-32 
41-25 
41-08 
39-06 
43-11 
- 2-92 
May 
50-82 
46-54 
48-49 
46-37 
51-15 
50-76 
56-60 
50-42 
50-14 
+ 411 
June 
57-09 
51-35 
54-14 
55-66 
61-20 
55-71 
54-50 
53-24 
55-36 
+ 9-33 
July 
56-10 
56-55 
55-55 
54-14 
58-65 
60-67 
58-11 
56-27 
57-00 
+ 10-97 
August 
55 05 
59-90 
57-12 
54-08 
54-60 
59-16 
56-58 
53-20 
56-23 
56-38 
+ 10-35 
September 
52-28 
53-08 
55-67 
52-30 
50-06 
55-69 
49-11 
51-73 
51-82 
52-43 
+ 6-40 
October 
43-32 
44-49 
42-93 
45-74 
47-86 
47-58 
47-50 
45-99 
45-49 
45-95 
i - 0-08 
November 
36-45 
39-98 
39-38 
42-85 
41-94 
43-02 
44-38 
40-20 
41-05 
41-60 
- 4-43 
December 
45-47 
45-50 
32-04 
37-08 
32-53 
38-37 
39-22 
36-71 
38-36 
- 7-67 
Year. 
47-17 
45-88 
45-01 
44-59 
47-90 
46-05 
45-99 
45-64 
46-03 
176. Mean Temferature at Makerstoun. — The mean temperature of the air in the shade, as deduced fe'om 
observations in the 8 years, 1842-9, 
= 46°-03, with a prohahle error of 0°-24. 
The year 1845 had the lowest mean temperature and the year 1846 had the highest, the former being 
1^-44 less than the mean of the 8 years, and the latter being l°-87 more. 
The mean temperature at Makerstoun for any future year = 46°'0, with a probable error of 0°-7. 
Naming the three coldest months, the meteorological winter, the three hottest, summer, and the inteme- 
diate quarters, spring and autumn, we find their mean temperatures at Makerstoun, as follows : — 
Meteorological "Winter, Dec, Jan., Feb., Mean Temperature = 36°-97 
Spring, March, April, May, = 44°-24 
Summei', June, July, Aug., = 56°-25 
Autumn, Sept., Oct., Nov = 46^^-66 
177. Annual Variation of Temperature. — By the monthly means from the 8 years' observations 
The maximum temperature occurred approximately July 22 
The minimum temperature January 27 
The mean temperature April 29 and October 14 
The lowest monthly mean temperature occurred in 4 years in January, in 2 years in December, ixnd in 2 years 
in February. The highest monthly mean temperature occurred in 4 years in July, in 2 years in Juno, and in 
2 years in August. 
The liighest monthly mean temperature occiu'rcd Juno 1846, = 6r-20 
The lowest monthly moan temperature occurred December 1844, = 32''"-04 
The range of the monthly mean temperature in 8 years therefore = 2 9 '"^•16 
The greatest yeaidy range of monthly mean temperature occurred in 1846, = 28""-67 
The least 1849, = 19 -59 
Tlic diflerenco between the temperatures of the hottest and coldest months in the moan of 8 yoai-s = 20' -96 
2 months "... = 20'-42 
3 months = 19'-28 
