TABLES OF DIFFERENCES OF MEAN TEMPERATURES. 143 



Hour. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 





Montreal, Canada East. 



■ I.at. 



45° 3= 



'. Long. 73° 



33' W. of G. 











J. S. Mc 



Cord. 



Alt. 57 feet. Aug. 1839 



to July, 1841, inclusive. 





























































Mdii't 



— I.I 



—1-3 



—1-3 



—2.5 



— 4.S 



—5-2 



—4.4 



— 4.0 



—3 



9 



—2.8 



—1.4 



-1-7 



-2.85 



I 



—1.4 



—1.6 



—4.4 



—3 



I 



-4.8 



—4 



5 



—5 



I 



— 5-0 



—4 



9 



—2-5 



1.2 



— 0.9 



—330 



2 



—2.4 



—2.7 



—2.9 



—4 



4 



-6.9 



—7 



4 



—7 



2 



-5-4 



—4 



3 



—4.0 



—1.6 



— 1.0 



— 4.20 



3 



—1-3 



—2.7 



—5-2 



—5 



I 



-6.5 



—5 



I 



—6 



8 



—6.0 



—5 



2 



-3-6 



—1.6 



—I.S 



—4.25 



4 



—2.9 



—3-4 



-5.6 



—7 



I 



—7.0 



—7 



2 



—7 



6 



—6-3 



—5 



6 



-4.8 



—1.8 



—1.4 



—4.96 



S 



—1.9 



— 4.0 



—6.8 



—6 



S 



—6.6 



—6 



3 



—7 



7 



-6.4 



—5 



4 



—4-5 



— 2.1 



— 2.2 



— 5-05 



6 



—3-5 



—3-9 



—5.2 



—5 



6 



—6.6 



—5 



5 



—5 



5 



—6.0 



—4 



6 



—4.8 



—1.4 



—'■3 



—4.50 



7 



— 2.0 



—5-2 



—7-1 



—3 



8 



-3.6 



—4 



7 



—3 







— 2.1 



—3 



5 



-3-6 



— 2.0 



— 2.1 



-3-56 



8 



—31 



—3-2 



—3-3 



—3 



4 



—31 



— 



9 



— 



6 



—2.8 



— 2 



2 



—2.5 



—0.8 



—0.9 



—2.24 



9 



— 1.2 



— 4.0 



— 3-0 





7 



— o.S 











— 



2 



+0.6 



— 



7 



—0.8 



— 0.6 



— I.I 



— 1.02 



o 



+0.2 



+0,8 



0.0 



+0 



8 



+ 1.0 



+ 1 



7 



+2 



9 



+ 1-7 



+ 1 



S 



+ 1.0 



+0.4 



— 0.2 



+0-93 



II 



+ 1.1 



+0.2 



+ 2-5 



+2 



S 



+2.8 



+3 



4 



+3 



2 



+3-6 



+2 



2 



+2.7 



+ 1-4 



+0.5 



+2.17 



Noon 



+2.8 



+3-5 



+4-2 



+5 







+7.1 



+5 



2 



+5 



5 



+5.6 



+5 



4 



+4.2 



+ 1.9 



+ 1.2 



+4-3° 



I 



+ 1-5 



+4.8 



+7-4 



+4 



9 



4-5.8 



+6 







+6 



I 



+6.6 



+5 



I 



+5-4 



+3-5 



+2.4 



+4-95 



2 



+4.1 



+5-4 



+6.5 



+6 







+S.8 



+7 



7 



+7 



4 



+ 7-9 



+6 



6 



+7.0 



+ 2-4 



+2.5 



+6.02 



3 



+2.4 



+6.1 



+9.0 



+6 



3 



+6.5 



+ 6 



9 



+8 







+7-3 



+6 



7 



+5.8 



+3-2 



+2.8 



+5-91 



4 



+3-9 



+3-6 



+6.0 



+ 5 



8 



+8.4 



+7 







+7 



5 



+7-7 



+6 



7 



+5-6 



+ 2.5 



+3-2 



+ 5-65 



5 



+0.6 



+4.1 



+6.S 



+5 



6 



+6.6 



+6 



2 



+6 



5 



+5-5 



+5 



8 



+3-2 



--1.2 



+ 1.4 



+4-43 



6 



+ 1.8 



+ I-S 



+3-4 



+3 



9 



+3.9 



+ 5 







+ 5 



4 



+5.6 



+2 



8 



+2.8 



--1.0 



+ 1-3 



+ 3-20 



7 



+0.6 



+ 1.2 



+2.4 



+2 



9 



+3-5 



+3 



2 



+2 



9 



+ 1-4 



+0 



6 



+ 1.0 



+0.4 



+0.7 



+ 1-74 



8 



+0.9 



+0.5 



+ 1.2 



+0 



8 



+ 1.6 



+ 1 



I 



+0 



7 



+0.7 



— 



I 



+0.2 



0.0 



0.0 



+0-65 



9 



+0.7 



+ 1.0 



+0.7 



— 



4 



—0.6 



— I 



6 



— I 



2 



—1.6 



— I 



3 



— 0-3 



— 0.1 



+0.7 



—0-34 



lO 



— 0.2 





+0.3 



— 



6 



—1.9 



— 2 



5 



— 2 



6 



— 2.0 



— 2 



4 



—1.4 



— 1.2 



—0.9 



—1.30 



II 



—0,6 



—0.2 



—1.8 



— 2.1 





-3-5 



-3-4 



— 3.1 



— 3-0 



-2-5 



-1-5 



— 0.2 



— 2.02 



Comb's 





























lO, lO 



0.0 



+0-3 



+0.1 



+0.1 



—0.4 



—0.4 



+0.1 



— 0.1 



—0.4 



— 0.2 



—0.4 



— 0.5 



—0.1 8 



6, 2, 9 



+0.4 



+0.8 



+0.7 



0.0 



+0.5 



+0.2 



+0.2 



+0.1 



+0.2 



+0.4 



+0.3 



+0.6 



+ 0-39 



6, 2, 10 



+0.1 



+0.4 



+O.S 



— 0.1 



+O.I 



— 0.1 



— 0.2 



0.0 



— 0.1 



+0-3 



— 0.1 



+ 0.1 



+0.07 



7.2,9 



+0.9 



+0.4 



0.0 



+0.6 



+ 1-5 



+0.5 



+ 1.1 



+ 1.4 



+0.6 



+ 1.0 



+0.1 



+0,4 



+0.71 



7.2,9bi, 



+0.9 



+0.5 



+0.2 



+0.3 



+ 1.0 



0.0 



+0.5 



+0.6 



+0.1 



+0.7 



0.0 



+0.4 



+0.44 



3. 9, 3. 9 



+0.1 



+0.1 



+0.4 



0.0 



0-3 



0.0 



0.0 



+0.1 



— 0.1 



+0.3 



+0.2 



+0.1 



+0.07 



Tl 



lunde 



r Bay Islam 



1, Lak 



e Hur 



on, M 



ieh. 



Lat. 45° 2'. Long. 83° 17' 



W. of G. 









Alt. 



610 feet 



Dec. 



1S63, to 



Dec. 1865. 









Mdn't 



—0.9 



—1.9 



— 2.2 



—2.9 



—3-4 



—4-3 



-3-8 



—4.0 



—2.9 



—2.5 



—0.8 



—0.8 



—2.52 



o 30 



—1-3 



—1.8 



—2.9 



—3-4 



—4.1 



—4-7 



—4 



5 



—4-3 



— 2 



6 



— 2 



3 



^i 



I 



— 1.0 



— 2.S2 



I 



—1.6 



— 2.2 



— 3-2 



—3-8 



—4.4 



—4.9 



—4 



9 



—4-5 



— 2 



8 



—2 



5 



— I 



4 



— I.I 



—3.10 



I 30 



— 2.0 



— 2.S 



—3-4 



—4.0 



—4-7 



-5-3 



—5 



4 



-4.8 



— 2 



9 



— 2 



7 



— I 



5 



— 1.2 



-3.36 



2 



—2-3 



—2.6 



—3-7 



—4.4 



—5.0 



-5.6 



—5 



8 



—51 



— 3 



I 



— 2 



9 



— I 



6 



—1-3 



— 3.60 



2 30 



—2-5 



—2.8 



—3-9 



-4.6 



—51 



—5-9 



—6 



I 



-5-2 



— 3 



3 



—3 







— I 



6 



— 1.4 



—3-77 



3 



—2.6 



—2.9 



—4.0 



—4-7 



—5.2 



—6.1 



—6 



4 



-5-4 



— 3 



4 



— 3 







— I 



8 



—1.6 



—3-91 



3 3° 



—2.6 



—2.9 



—3-9 



-4.6 



—5-3 



—5.9 



—6 



4 



-5-4 



— 3 



5 



—3 



I 



— I 



8 



—1-5 



—3-90 



4 



—2-5 



—2.8 



-3-8 



—4-5 



—5-2 



-H 



—6 



3 



-5-5 



— 3 



6 



—3 



I 



— I 



9 



—1.4 



—3. 86 



4 30 



—2.4 



—2.8 



—3-7 



—4.4 



—51 



-5.8 



—6 



2 



—5-5 



—3 



8 



—3 



2 



— I 



8 



—1.4 



-3-S3 



5 



—2-3 



—2.6 



-3-6 



—4-3 



—4.9 



—5-4 



—6 







-5-5 



— 3 



8 



— 3 



2 



— I 



9 



—1-3 



-3-72 



5 30 



— 2.2 



-2.5 



—3-5 



—4.0 



—4.2 



—4.9 



—5 



5 



-5-3 



— 3 



7 



— 3 



I 



— I 



8 



— 1.2 



—3-48 



6 



2.1 



—2.4 



—3-3 



-3-6 



—3-3 



— 4.0 



—4 



7 



—5.0 



—3 



7 



— 3 







— I 



8 



— I.I 



-3.16 



6 30 



2.0 



—2.3 



—2.9 



—2.9 



—2.6 



—2.7 



—3 



5 



—4.2 



—3 



3 



— 2 



9 



— I 



7 



— I.I 



—2.66 



7 



2.0 



— 2.1 



—2-5 



— 2.0 



— i-S 



—1.7 





9 



—3.2 



— 2 



8 



— 2 



6 



— I 



8 



— I.I 



— 2.09 



7 30 



— 1.9 



— 1.9 



—2.0 



— I.I 



—0.5 



—0.5 



— I 



2 



—1.9 



— 2 







— 2 



2 



— I 



6 



—0.9 



— 1.46 



8 



— i.S 



—1.6 



— I.O 



— 0.2 



+0.4 



+0.6 



— 



I 



—0.7 



— I 



I 



. — I 



8 



— I 



5 



—0.7 



— 0.76 



8 30 



— 1.2 



—1.2 



—0.1 



+0.6 



+ 1.1 



+ 1-5 



+ 1 







+0.4 



— 



5 



— I 



2 



— I 



I 



—0.6 



— 0. 10 



9 



—0.9 



—0.6 



--0.5 



+ 1-3 



+ '•7 



+2.1 



+ 1 



9 



+ 1-3 



+0 



4 



— 



5 



— 



8 



—0.4 



+0.51 



9 30 



—0-3 



O.I 



--1.4 



+ 1.8 



+2.0 



+2.9 



+2 



6 



+ 1.9 



+ 1 







+° 



2 



— 



3 



^O.I 



+ I.C9 



10 



+0.1 



+0.4 



--2. 1 



+2.4 



+2.5 



+3-4 



+3 



3 



+ 2.7 



+ 1 



7 



+0 



9 



+0 



I 



+0.2 



+ 1.66 



10 30 



+0.7 



+I.I 



+2.8 



+2.9 



+30 



+3-9 



+3 



8 



+3-6 



+2 



4 



+ 1 



6 



+0 



6 



+0.5 



+2.25 



II 



+ 1-3 



+ 1.8 



+3-8 



+3-4 



+3-3 



+4.2 



+4 



3 



+4-4 



+3 







+2 



3 



+0 



9 



+0.9 



+2.81 



II 30 



+1.9 



+2.4 



+3-8 



+3-8 



+3-6 



+4-5 



+4-7 



+5-1 



+3-6 



+2.9 



+ 1-5 



+ 1-3 



+3-27 



' Fron 



a. Prof. C 



Tuyot's Met. and 



Phys. Ta 



bles, Sm 



Misc. C 



:oll. ; W 



ash., 1858. Fror 



a Aug. 1839, to J 



uly, 184c 



, inclu. 



the obser 



vations v 



vere taken at the 



even hou 



rs; from 



Aug. I 



340, to J 



uly, 1841, at the 



odd hours. 



[Sc 



h.] 



