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. 



lb42. 



1843. 



1844. 



1845. 



1846. 



1847. 



1848. 



1849. 



Mean 

 1842-9. 



Monthly 

 Variations. 





o 



o 



o 







„ 



„ 



o 



„ 



o 



^ 



o 



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 



+ 4-11 



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 



H- 10-97 



August 



5505 



59-90 



57-12 



54-08 



54-60 



59-16 



56-58 



53-20 



56-23 



56-38 



+ 10-35 



September 



52-28 



5308 



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 



- 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 



3836 



- 7-67 



Year. 





47-17 



45-88 



45-01 



44-59 



47-90 



46-05 



45-99 



45-64 



46-03 





0°-7. 



the interme- 



176. Mean Temperature at 3fakerstoun. — The mean temperature of the air in the shade, as deduced from 

 ohservations 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 



l°-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 

 Naming the three coldest months, the meteorological winter, the three hottest, summer, and 



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 



Summer, 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 Januaiy, 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 monthly mean temperature occurred in 1846, = 28°-67 

 Theleast 1849, = 19°-59 



The difference between the temperatures of the hottest and coldest months in the mean of 8 years = 20 '95 



2 months = 20°-42 



3 months = 19°-28 



