410 



Results of Makerstoun Observations, 1844. 



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



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 iVutumn, ll°-64 Year, 9°-63 



TABLE VI. — Extremes of Temperature for each Month from the Eegister Thermometei-s ; Extremes 

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

 for 1844. 



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

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

 therefore more above the mean temperature in the summer months than the minimum for the month is liehiw 

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

 tlian the maximum is above it. 



Extreme Values and Ranges of Temperature for 1844. 



I Range = 70'- 

 The highest daily mean temperature occurred July | ~^c \ 



The highest temperature of 1844 occurred ." luly 23. 



The lowest Feb. 22. 



= 63°-8 



Thelowest Dec. 6. =22°-3 



The highest weeklv mean temperature occurred July 22-27. = 62°-7 



The lowest ." Dec. 5-ll.=27°-7 



The highest monthly mean temperature occurred July =55°- 6 



The lowest Dec. 



Range = 41 '-1. 



Mean = 4 6°- 6 

 Mean = 43' -0 



Mean = 45' -2 

 Mean = 43=-8 



The 

 The 



|Range = 35°0, 



= 32-0 }Range=23-6 



highestquarterly mean temperature is that for June, July, Aug. = 54°-59 1 „ on' an m aa' on 



lowest Dec, Jan., Feb. =33°-99 j "''"^*-'^" '""• *'«"'-44-29. 



The greatest range of temperature in a civil day occurred May 1. =37 'S. 



an astronomical day occurred April 29 — 30. =39-2. 



The least range of temperature in a civil day occurred December 25. = 1''6. 



an astronomical day oocun-ed December 26-27. = VA. 



The greatest range of temperature, within 30 days, occurred Sept. 2 — Sept. 22. Kange, = 46°'6. 



daily mean temperature, within 30 days, occurred Nov. 16 — Dec. 6. =27 '9. 



