METEOROLOGICAL REGISTER KEPT AT LEITH FORT IN 1826 AND 1827. 357 



TABLE, showing the Mean Temperature op each Hour for the Six Summer 

 Months, from April to September inclusive, and for the Six Winter Months, 

 from October to March inclusive, for 1826 and 1827. 





1826. 







Six Summer 



Six Winte 



Hours. 



Months. 



Months. 



1 A.M. 



50818 



40 ? 972 



2 



50260 



40-832 



3 



50112 



40763 



4 



49667 



40772 



5 



49-604 



40-675 



6 



50-366 



40-654 



7 



51-554 



40-672 



8 



52-853 



41-255 



9 



54-428 



42-219 



10 



55-604 



43-219 



11 



56-808 



45123 



12 



57-740 



44-590 



1 P.M. 



58-234 



45-165 



2 



58-528 



45-271 



3 



58-662 



45-104 



4 



56731 



44-647 



5 



59-333 



44026 



6 



58726 



43-200 



7 



57-026 



42-727 



8 



55-229 



42-416 



9 



53-943 



42019 



10 



53141 



41-820 



11 



52-561 



41-470 



12 



51-857 



41-385 



Mean, 54324 



42-541 





1827. 





Hours. 



Six Summer 



Six Winter 



Months. 



Months. 



1 A..M. 



51°-761 



41°667 



2 



51-227 



41-589 



3 



50-749 



41-501 



4 



50669 



41-418 



5 



51026 



41187 



6 



51-641 



41181 



7 



52-576 



41-223 



8 



53-721 



41-419 



9 



54-813 



41-900 



10 



55-396 



42-411 



11 



56701 



43153 



12 



57337 



43684 



1 P.M. 



57846 



43-848 



2 



58- 104 



43-969 



3 



58-229 



43-689 



4 



58-247 



43-304 



5 



57-935 



42-966 



6 



57-224 



42-488 



7 



56-292 



42143 



8 



55-285 



42062 



9 



54-292 



41-946 



10 



53-379 



41766 



11 



52-959 



41-800 



12 



52-359 



41-851 



Mean, 54-574 



42-257 



The summer curve of 1826 retains the same intermediate position between 

 those of 1824 and 1825 that it did in the annual curve; but in the morning 

 hours it descends nearly to the curve of the cold year of 1824, while in the 

 afternoon hours it rises towards the curve of the warm year 1825, thus display- 

 ing, in the summer season, the character of an American climate. 



The summer curve of 1826 bears the same relation to that of 1827, keeping 

 below it in the morning till about 11 o'clock, when it rises high above it till 8 

 o'clock, when it descends till midnight. 



In the winter curves, that of 1826 keeps between those of 1824 and 1825 

 from 1 o'clock a.m till 8 o'clock. It then rises above that of 1825, and keeps 

 above it till 6 o'clock in the evening, when it again meets that of 1825, coinciding 

 with it till about 3 o'clock in the morning. Hence it follows that the peculiar 

 character of 1826 appears still more strikingly in the winter than it does in the 

 summer season. 



The winter curve of 1826 bears a different relation to that of 1827 in its 

 morning branch, but a similar relation to it in its evening branch. 



