lxxxiv 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, 
| Monthly 
Month. 0 2. . | 1844. 1845. b ib 929) |lVariationes 
o” HIDU-G 
January . . 37-35) 34-71 
February : . 32-48 32-96 
March . : 38-36) 35:39) : 
April “ 79| 46-77 | 44-33 | 
May . 54| 48-49| 46.37) 
June : *35| 54:14) 55-66 
July . : 99:55 | 54.14 
August : . -12| 54-08) 54-60 
September 2 . : 52-30) 50-06 
October : . : 45:74 | 47.86 
November je . : 42-85 | 41-94 
December : 5 32-04 | 37-08 
45-01 | 44-59 
176. Mean Temperature at Makerstoun.—The mean temperature of the air in the shade, as deduced from 
observations in the 8 years, 1842-9, 
= 46°-03, with a probable 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 1°-°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 interme- 
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,  .............c00+6 = 44°24 
Summer, June, July, Aug.,  ........esceeeeeee = 56°25 
Ain, «Sept, Oct Navenen oc. es.scs-seestesee = 46°66 
177. Annual Variation of Temperature.—By the monthly means from the 8 years’ observations 
The maximum temperature occurred any oximately July 22 
The minimum temperature «++ +++++seeeseeeee esses January 27 
The mean temperature tet eeeereeteereeeeeeeees April 29 and October 14 
7 
The lowest monthly mean temperature occurred in 4 years in January, in 2 years in December, and in 2 years 
in February. The highest monthly mean temperature occurred in 4 years in July, in 2 years in June, and in 
2 years in August. 
The highest monthly mean temperature occurred June 1846, = 61°-20 
The lowest monthly mean temperature occurred December 1844, = 32°-04 
The range of the monthly mean temperature in 8 years therefore = 29°-16 
The greatest yearly range of eeeeoh mean geet occurred in 1846, = 28°-67 
The least aa dienes calaceiacisaclvennteiae tecscessecccssecsrecsesseeveee 1849, = 19°59 
The difference between the temperatures of the hottest and coldest months in the mean of 8 years = 20°95 
2Zmonths — ......---se0eee-e- 20°42 
SEMOOUNGn: ge iecsamensesm aes = 19°28 
