144 TABLES OF DIFFERENCES OF MEAN TEMPERATURES. 



Hour. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 



Thunder Bay Island. — Continued. 













t, 







(, 











^ 



3 



(, 



Q 



Q 



^ 



Noon 



+ 2-5 



+2.9 



+4.0 



+4.0 



+4-0 



+4-9 



+ 5.1 



+5-7 



+4.2 



+3-6 



+ 1.8 



+ 1.5 



+3.69 



I ° ^° 



+3.0 



+3-4 



+4-4 



+4.3 



+4 



2 



+5 



6 



+5-3 



+6.2 



+4.5 



+4.1 



+2-3 



+ 1.7 



+4.09 



I 



4-3-2 



+3-7 



+4-6 



+4.5 



+4 



4 



+5 



4 



+5.2 



+6.7 



+4.8 



+4.4 



+2.6 



+ 1.9 



+4.29 



I 30 



+H 



+4.1 



+4.8 



+4-6 



+4 



5 



+5 



4 



+5.7 



+6.9 



+5-1 



+4.8 



+2.9 



+2.0 



+4.52 



2 



+3.6 



+4.2 



+5.0 



+4.7 



+4 



7 



+6 







+5-9 



+ 7.0 



+5.3 



+5.0 



+3.0 



+ 1.9 



+4.62 



2 30 



+3-5 



+4-2 



+4.8 



+4-7 



+4 



7 



+6 







+6.0 



+6.9 



+5.3 



+ 5.0 



+3.2 



+ 1.9 



+4.69 



3 



+3-3 



+4.1 



+4-5 



+4.6 



+5 







+5 



9 



+6.1 



+6.5 



+5.1 



+4-7 



+3-0 



+ 1.7 



+4.55 



3 30 



+2.9 



+3-7 



+4.2 



+4-3 



+5 



I 



+5 



6 



+ 5-9 



+6.1 



+4.6 



+4.4 



+2.7 



+ 1-5 



+4.26 



4 



+2.2 



+3-1 



+3-8 



+4-1 



+5 







+5 



I 



+5.7 



+5.6 



+4.1 



+3.9 



+2.0 



+ 1.2 



+3.83 



4 30 



+2.0 



+2.4 



+3-3 



+3-7 



+4 



6 



+4 



8 



+5-1 



+5.1 



+3-6 



+ 3-2 



+ i.8_ 



+ 1.0 



+3.39 



5 



+ 1.6 



+ 1.9 



+2.6 



+3-2 



+4 



I 



+4 



4 



+4.5 



+4.3 



+3.0 



+2.6 



+ 1.2 



+0.8 



+2.86 



5 33 



+ 1-3 



+ '•5 



+2.0 



+2.7 



+3 



4 



+3 



8 



+3-8 



+3.4 



+2.2 



+2.0 



+ 1.0 



+0.7 



+ 2.3S 



6 



+0.9 



+0.9 



+ I.S 



+2.1 



+2 



7 



+3 



2 



+3.0 



+2.6 



+ 1.5 



+ 1.3 



+0.7 



+0.6 



+ 1.76 



6 30 



+0.7 



+0.6 



+0.8 



+ 1.4 



+2 







+2 



I 



+2.2 



+ 1.5 



+0.9 



+0.7 



+0.6 



+0.5 



+ 1.17 



7 



+0.4 



+0.4 



+0.2 



+0.8 



+ 1 



2 



+ 1 







+ 1.4 



+0.9 



+0.2 



+0.3 



+0.3 



+0.3 



+0.62 



7 30 



+0.3 



+0.1 



— 0-3 



+0.2 



+0 



4 



+0 



3 



+O.S 



+0.2 



—0.3 





+0.3 



+0.1 



+0.15 



8 



+0.2 



0.0 



—0.5 



— 0.2 



— 



2 



— 



5 



— 0-3 



—0.4 



—0.8 



■ — °-5 



+0.1 



+0.3 



— 0.22 



8 30 



+0.1 



—0-5 



—0.8 



—0.6 



— 



9 



— I 



2 



—0.8 



— I.I 



— I.I 



— 0.6 



0.0 



+0.2 



— 0.60 



9 



0.0 



—0.4 



I.O 



— 1.0 



— I 



4 



— I 



7 



—1.4 



—1.7 



— i-S 



— I.I 



— 0.2 



0.0 



—0.94 



9 3° 



— 0.2 



—0.7 



— 1.2 



—1-3 



— I 



9 



— 2 



2 



—1.8 



— 2.2 



—1.8 



—1-3 



— 0.2 



— 0.1 



—1.23 



10 



— 0-3 



—0.8 



—1-3 



—1.6 



— 2 



3 



— 2 



6 



—2.4 



—2.7 



—1.9 



—1.5 



—0.4 



— 0.1 



—1.48 



10 30 



—0.5 



— '-3 



—1-5 



— 2.0 



— 2 



6 



—3 



2 



—2.6 



—3-1 



— 2.2 



-1.7 



—0.5 



—0.4 



—1.79 



II 



—0.7 



—1-3 



—1.8 



—2-3 



— 2 



9 



— 3 



5 



— 3-0 



—3.5 



—2.5 



— 2.0 



—0.7 



^0.2 



. — 2.02 



II 30 



— o.S 



-1-5 



— 2.0 



—2-5 



—3-2 





—3-4 



—4.1 



—2.7 



—2.3 



—o.S 



—0.6 



—2.31 



Comb's 





























10, lO 



— 0.1 



— 0.2 



+0.4 



+0.4 



+0.1 



+0.4 



+0.4 



0.0 



. — 0.1 



—0.3 



— 0.1 



0.0 



+0.08 



6,2,9 



+0.5 



+0.5 



+0.2 



0.0 



0.0 



+0.1 



— 0.1 



+0.1 



0.0 



+0.3 



+0.3 



+0.3 



+0.16 



6, 2, 10 



+0.4 



+0.3 



+0.1 



— 0.2 



— 0.3 



— 0.2 



—0.4 



— 0.2 



— 0.1 



4-0.2 



+0.3 



+0.2 



— 0.02 



7,2,9 



+0.5 



+0.6 



+0.5 



+0.6 



+0.6 



+0.9 



+0.9 



+0.7 



+0.3 



+0.4 



+03 



+0.3 



+0.52 



7, 2, 9 bis 



-1-0.4 



+0.3 



+0.1 



+0.2 



+0.1 



+0.2 



+0.3 



+0.1 



. — 0.1 



0.0 



+0.2 



+0.2 



+0.15 



3.9,3.9 



0.0 



0.0 



0.0 



0.0 



0.0 



0.0 



0.0 



+0.2 



+0.1 



0.0 



0.0 



— 0.1 



+0.04 



N. B. The hours 6 



m, 9m' 3a.' ^a. were employed in the U. S. Lake Survey, prior to June, i85o, the differences for the 1 



means at these hours are as follows : — 1 



6,9.3.6 



+0-3 



+0.5 



+O.S 



+I.I 



+ 1-5 



+ 1-5 



+ 1.6 



+ 1.3 



+0.8 



+0.6 



+0.3 



+0.2 



+0.90 



The mean of 6^, 9^, 3^, is about the same as 7^. 



Toronto, Canada West. Lat. 43° 39'. Long. 79° 23' W. of G. 



Alt. 342 feet. July, 1842, to July, 1848. 



Mdn't 



—1.52 



—1.82 



—2.47 



-3.26 



— 5-03 



—5-31 



—6.54 



—5.46 



—3.96 



—3.25 



—1.82 



— 0.91 



— 3-45| 



I 



—1.99 



— 2 



20 



—2 



95 



—4 



01 



-5.89 



—6.00 



—741 



—6. 1 1 



—4 



57 



— 3 



85 



2.H 



—1.49 



—4 



05 



2 



—2.07 



— 2 



54 



^"3 



33 



—4 



68 



-6.73 



—6.70 



—7-97 



—6.79 



—5 



16 



—4 



17 



—2.39 



—1.86 



—4 



53 



3 





— 2 



97 



—3 



62 



—4 



88 



—7-44 



—7.48 



—8 



69 



—7.46 



-5 



62 



—4 



33 



—2.71 



—1.99 



—4 



95 



4 



—2.32 



—3 



27 



—4 



00 



—5 



31 



—7.91 



—8.05 



—9 



32 



-7.84 



—6 



21 



—4 



63 



-2.87 



— 2.02 



—5 



31 



5 



—2.50 



—3 



62 



—4 



52 



—5 



68 



—7.86 



—7.86 



—9 



37 



— 8.03 



—6 



84 



—4 



So 



-2.76 



— 2.04 



-5 



49 



6 



—1.77 



—4 



19 



—4 



80 



—5 



55 



—5.41 



—5.21 



—6 



16 



—6.58 



—6 



16 



—4 



58 



—2.49 



— 2.46 



—4 



61 



7 



-1.87 



—4 



32 



—3 



93 



—3 



26 



—2-43 



—2.40 



— 2 



49 



-3.61 



—3 



61 



—3 



83 



—2.49 



—2.62 



—3 



07 



8 



— 1.64 



—3 



30 



— I 



95 



— I 



01 



— 0.21 



— 0.06 



+0 



II 



—0.34 



— 



86 



— I 



58 



— 1.44 



—2.19 



— I 



21 



9 



— 0.67 



— I 



00 



+0 



22 



+0 



97 



+2.11 



+ 1.S2 



+2 



31 



+ 2.16 



+ ■ 



56 



+ > 



10 



+0.09 



— 1. 01 



+0 



So 



10 



+0.56 



+ 1 



01 



+ 1 



95 



+ 2 



49 



+3.81 



+3.49 



+4 



01 



+4.14 



+3 



53 



+3 



03 



+ 1.53 



+0.44 



+2 



50 



II 



+ 1-73 



+2.60 



+3-'S 



+3-87 



+4.94 



+4-77 



+5-56 



+ 5.59 



+4.96 



+4.40 



+ 2.54 



+ 1.68 



+3821 





