410 



Results of Makerstoun Observations, 1844. 



From Table II. we find the diurnal range of the mean hourly temperatures for each month to be — 



Jan. 

 5°-9 



Feb. 



7°-4 



March. 

 9°'7 



April. 



13°- 9 



Slay. 



14°-7 



June. 



12°-0 



July. 



12°- 9 



Aug. 



13-2 



Sept. 



12°-3 



Oct. 

 9°-8 



Nov. 

 3°-8 



Dec. 



3 c -5 



These ranges also follow the same law of variation as the means of the ranges ; the ranges of the hourly 

 mean temperature for each of the astronomical quarters, and for the year 1844, are — 



Winter, 4°-30 Spring, 10°-13 Summer, 12°-97 Autumn, ll°-64 Year, 9°-63 



TABLE VI. — Extremes of Temperature for each Month from the Register Thermometers ; Extremes 

 of Daily Mean Temperature, and of Diurnal Ranges, obtained from the Hourly Observations 

 for 1844. 







Extreme 



Temperatures. 





Extremes of Daily Mear 



i Temperature. 



Extreme Liurnal Ranges. 



Month. 

































Highest. 



Lowest. 



Range. 



Mean. 



Highest. 



Lowest. 



Range. 



Mean. 



Greatest. 



Least. 





d. 



o 



d. 



o 



o 



a. 



o 



d. 



o 



o 



o 



d. 



» 



d. 



o 



Jan. 



29 



51-7 



3 



13-2 



38-5 



32-4 



27 



47-5 



2 



25-8 



21-7 



36-6 



2 



16-5 



9 



4-6 



Feb. 



15 



48-2 



22 



1 1-5 



36-7 



29-8 



15 



42-8 



I 6 

 ) 22 



23-1) 

 23-3/ 



19-7 



32-9 



27 



25-2 



9 



4-9 



March 



30 



61-2 



18 



18-2 



430 



39-7 



27 



491 



5 



30-8 



18-3 



39-9 



30 



320 



3 



3-5 



April 



29 



66-9 



6 



26-4 



40-5 



46-6 



20 



52-8 



5 



38-9 



13-9 



45-8 



30 



35-6 



9-8 



May 



13 



71-3 



18 



29-6 



41-7 



50-4 



13 



55-9 



18 



39-9 



160 



47-9 



1 



37-8 



11 



5-9 



June 



23 



75-4 



17 



36-2 



39-2 



55-8 



6 



60-1 



1 



48-2 



11-9 



54- 1 



4 



25-7 



18 



6-9 



July 



23 



81-8 



17 



38-3 



43-5 



60-0 



{2} 



31 



63-8 



4 



49-9 



13-9 



56-8 



23 



31-8 



24 



71 



Aug. 



30 



75-5 



27 



36-2 



39-3 



55-8 



60-3 



27 



49-1 



11-2 



54-7 



29 



32-2 



22 



6-6 



Sept. 



2 



76-3 



22 



29-7 



46-6 



530 



7 



60-7 



21 



42-9 



17-8 



51-8 



2 



31-8 



17 



4-9 



Oct. 



3 



621 



23 



23-9 



38-2 



43-0 



3 



54- 1 



24 



35-5 



18-6 



44-8 



23 



26-3 



30 



2-7 



Nov. 



17 



54-2 



25 



23-6 



30-6 



38-9 



16 



50-4 



25 



30-6 



19-8 



40-5 



21 



17-8 



5 



2-8 



Dec. 



29 



43-0 



7 



15-7 



27-3 



29-3 



18 



37-7 



6 



22-3 



15-4 



30-0 



7 



16-9 



25 



1-6 



The means of the highest and lowest temperatures in each month are less than the monthly mean tempe- 

 ratures in the winter months, and higher in the summer months. The maximum temperature of the month is 

 therefore more above the mean temperature iti the summer months than the minimum for the month is below 

 it ; the reverse is the case for winter ; the minimum then is farther below the mean temperature for the month 

 than the maximum is above it. 



Extreme Values and Ranges of Temperature for 1844. 



The highest temperature of 1844 occurred July 23. =81° 



The lowest Feb. 22. =11° 



The highest daily mean temperature occurred July j pe } =63 0, 



Thelowest Dec. 6. =22°- 



The highest weeklv mean temperature occurred July 22-27. =62° 



Thelowest Dec. 5-11. =27° 



The highest monthly mean temperature occurred July =:55° 



Thelowest Dec. =32°' 



The highest quarterly mean temperature is that for June, July, Aug. = 54°' 

 The lowest Dec, Jan., Feb. = 33°' 



The greatest range of temperature in a civil day occurred 



an astronomical day occurred 



The least range of temperature in a civil day occurred 



an astronomical day occurred 



The greatest range of temperature, within 30 days, occurred 



daily mean temperature, within 30 days, occurred 



]Range = 70°-3. Mean = 46°-6 



lRange = 41°-l. Mean = 43°0 



1 ] Range = 35°-0. Mean = 45°-2 



!? ] Range = 23°-6. Mean = 43 c -8 



] Range = 20°- 60. Mean = 44°-29. 



59 

 99 



May 1. =37-8. 



April 29—30. = 39°& 



December 25. = l c '6. 



December 26-27- = 1°'4 

 Sept. 2— Sept. 22. Range, = 46°-6. 



Nov. 16— Dec. 6. = 27°-9. 



