EXPLANATIONS AND REMARKS. 



Table of corrections for daily variation of temperature, derived from observations made at 

 Toronto, Mohawk, New Haven, and Philadelphia ; for every hour and for various combi- 

 nations of hours, in degrees of Fahrenheit. 



Hours, 



C 



ji 



X. 



Pi 



&■ 



a 



_>N 



1, 



0. 



ti 



i 



J 



a 





^ 



fe 



S 



< 



S 



^ 



^ 



< 



m 







a 



P 



> 









^ 



Q 



Q 



Q 



Q 



J, 



Q 



















Mid't 



+ 1.6 



+ 2.2 



+ 2,8 



+3-7 



+4-7 



+ 5-2 



+ 5-2 



+4-7 



+4.2 



+3-2 



+2.0 



+ 1.4 



+3-41 



'm 



+ 2.0 



+2.7 



+3-4 



+4.6 



+5-6 



+6.3 



+6.0 



+5-4 



+4.6 



+3-8 



--2. 1 



+ 1.8 



+4.02 



2„ 



+2.2 



+3-1 



+3-9 



+5-3 



+6.4 



+7.1 



+6.7 



+6.0 



+5.2 



+4-3 



--2.5 



+2.1 



+4-57 



3m 



+ 2.5 



+3-6 



+4.3 



+5-7 



+7.2 



+7-8 



+7-3 



+6.5 



+5-7 



+4.7 



+2.9 



+2.4 



+5-05 



4m 



+ 2.7 



+3-9 



+4.7 



+6.2 



+7.8 



+8.3 



+7.8 



+7.0 



+6.2 



+5-1 



+3-2 



+2.6 



+5.46 



5m 



+3-0 



+4-2 



+5-2 



+6.5 



+7.8 



+8.1 



+7.8 



+7.2 



+6.6 



+5.4 



+3-4 



+2.8 



+5-67 



6m 



+3-0 



+4-5 



+5-4 



+6.3 



+6.4 



+6.4 



+6.3 



+6.5 



+6.4 



+ 5-5 



+3-5 



+3-1 



+ 5-27 



7m 



+3-1 



+4.6 



+4-7 



+4-7 



+4.0 



+3-8 



+3-7 



+4.5 



+4-7 



+4.6 



+3-4 



+31 



+4.08 



8m 



+ 2.8 



+3-5 



+2.7 



+2.4 



+ 1-5 



+ 1.1 



+ 1.1 



+ 1.8 



+2.2 



+2.6 



+2.4 



+2.7 



+2.24 



9m 



+1-4 



+ 1-3 



+0.5 



0.0 



—0.9 



— 1.2 



— 1.2 



—0.6 



— 0.2 



+0.2 



+0.7 



+ 1-3 



+0.1 1 



'°m 



— 0.4 



—0.9 



—1.6 



— 2.0 



—2.8 



—3-2 



—3-2 



—2.8 



—2-5 



— 2.1 



— I.I 



—0.5 



—1-93 



I'm 



—1.9 



—2.7 



— 3-2 



—3-7 



—4.4 



-4.8 



— 4-9 



-4.6 



—4.4 



—3-9 



—2.6 



— 2.0 



—3.60 



Noon. 



—3-2 



—4.1 



—4-5 



—5-1 



—5-7 



—6.1 



—6.2 



—5-9 



—5-7 



— S-3 



—3-8 



—3-2 



—4.91 



I^ 



—4.0 



—5-1 



—5-4 



—6.2 



—6.8 



—71 



—7-1 



-6.9 



—6.8 



—6,2 



—4-5 



—4.0 



-5.84 



2^ 



—4-5 



-5.6 



—6.1 



—7.0 



—7-5 



-7.8 



-7.6 



—7-5 



—7-4 



—6.8 



-4.8 



—4-3 



— 6.42 



3» 



—4.4 



—5-7 



—6.2 



—7.2 



-7.8 



—8.1 



-7.8 



-7.8 



-7.6 



-6.7 



-4-7 



—4.1 



-6.51 



4a 



-3-8 



—5-2 



-5.8 



—7-1 



-7.8 



—8.0 



—7-5 



-7.6 



—7-4 



—6.1 



-3-8 



—3-3 



— 6.12 



Sa 



—2.5 



—3-9 



—4-7 



-6.3 



—7.2 



—7.2 



-6.9 



—6.8 



—6.2 



—4.4 



—2.4 



— 2.0 



— 5-04 



6^ 



— i-S 



—2.3 



—2.9 



-4.6 



—5-5 



—5-7 



-5-4 



—5-1 



—4.0 



—2-5 



—1-3 



— 1.2 



—3- 5 1 



7a 



—0.7 



— 1.2 



—1-5 



— 2.2 



—2.9 



—3-3 



-3-° 



—2-5 



-1.6 



— 1.0 



—0-5 



—0.6 



—1.74 



8^ 



— 0.1 



—02 



—0.4 



— 0.2 



— 0.2 



—0.4 



— 0.2 



+0.1 



+0-3 



+0.2 



+0.1 



— 0.1 



—0.09 



9a 



+0.4 



+0^5 



+0.9 



+ 1.2 



+1-5 



+ 1.6 



+ 1.8 



+ 1-7 



+ 1.6 



+ 1.1 



+0.7 



+0-3 



+ 1.11 



I°a 



+0.9 



+ 1.1 



+ 1-5 



+ 2.2 



+2.7 



+3-0 



+3-1 



+2.9 



+2.7 



+ 1-9 



+ 1.1 



+0.7 



+ 1-99 



II 



+ 1.2 



+ 1-7 



+2.2 



+3-0 



+3-8 



+4-3 



+4.2 



+3-8 



+3-5 



+2.6 



+ 1-5 



+ 1.0 



+2.73 



Or 



+3-0 



4-4.5 



+5-3 



+6.4 



+7.8 



+8.1 



+7.8 



+ 7-1 



+6.5 



+5-3 



+3-4 



+2.9 



+5.68 



Os 



—2.7 



—30 



—2.8 



—2.8 



— 2.2 



— 1-5 



—1-3 



—2.4 



—3-7 



—3-7 



—2.9 



—2.7 



— 2.64 



Max. 



—4-5 



—5-8 



—6.2 



— 7-3 



—7-9 



—8.2 



-7.8 



-7.8 



—7-7 



-6.9 



—4.9 



—4-3 



—6.62 



Mill. 



+3-3 



+4.6 



+5-4 



+6.5 



+7-9 



+8.4 



+7-9 



+7.2 



+6.7 



+5-6 



+3-6 



+ 3-2 



+5-87 



Max. & Min. 



—0.6 



—0.6 



—0.4 



—0.4 



0.0 



+0.1 



+0.1 



— 0.3 



—0.5 



—0.6 



—0.6 



—0.6 



—0.37 



O.Os 



+0.2 



+0.7 



+ 1-3 



+ 1.8 



+2.8 



+3-3 



+3.2 



+2.4 



+ 1.4 



+0.8 



+0.2 



+0.1 



+ 1.52 



?:?: 



+ 1-7 



+2.5 



+3-1 



+3-8 



+4.6 



+4-9 



+4-8 



+4-4 



+4.0 



+ 3-2 



+2.1 



+ 1.6 



+3-39 



— 0.5 



— 0-3 



0.0 



0.0 



0.2 



— °-3 



— 0.4 



— 0.2 



— 0.2 



—0.4 



— 0-5 



—0.4 



—0.28 



7m -a 



— 0.7 



— 0-5 



—0.7 



— 1.2 



1.7 



— 2.0 



— 2.0 



— i-S 



— 1-3 



— I.I 



—0.7 



— 0.6 



—1. 17 



7m 9a 



+ 1.7 



+2.6 



+2.8 



+3-0 



+2.7 



+2.7 



+2.8 



+3-1 



+3-1 



+2.9 



+2.0 



+ 1-7 



+2.60 



8m 2a 



—0.8 



— I.I 



—1-7 



—2-3 



— 3.0 



—3-3 



-z-z 



—2.9 



—2.6 



— 2.1 



— 1.2 



—0.8 



—2.09 



8m 7a 



+ 1.0 



+ 1.2 



+0.6 



+0.1 



—0.7 



— I.I 



—0.9 



— 0.4 



+0.3 



+0.8 



+0.9 



+ 1.1 



+0.24 



Or 9m 3a 



0.0 



0.0 



— 0.1 



— 0-3 



— 0.3 



— 0.4 



— 0.4 



—0.4 



—0.4 



—0.4 



— 0.2 



0.0 



—0.24 



Or N. Q, 



I.O 



—0.9 



7 



—0.5 



0.0 



+0.2 



+0.1 



— 0.4 



— 1.0 



— 1.2 



• — I.I 



— 1.0 



— 0.62 



Or ^ 9a 



. — 0.2 



0.0 



+0.3 



+0.5 



+0.8 



+0.9 



+0.8 



+0.6 



+0.4 



+0.1 



— 0.1 



■ — °-3 



+0.32 



Or la '"a 



0.0 



+0.2 



+0.5 



+0.8 



+ 1.2 



+ "■3 



+ 1-3 



+1.0 



+0.8 



+0.3 



0.0 



— 0.1 



+0.61 



Or 2a 0» 



—1.4 



—1.4 



.—1.2 



— I.I 



—0.6 



—0.4 



—0.4 



—0.9 



—I-S 



—1-7 



—1.4 



—1.4 



—I- 13 



Or 2a 9a 



—0.4 





0.0 



+0.2 



+0.6 



+0.6 



+0.7 



+0.4 



+0.2 



— 0.1 



— 0.2 



—0.4 



+0.12 



Or 3a 9a 



— 0-3 



— 0.2 



0.0 



+0.1 



+0.5 



+0.5 



+0.6 



+0-3 



+0.2 



— 0.1 



— 0.2 



— 0-3 



+0.09 



6m N. 6^ 



—0.6 



—0.6 



— 0.7 



— I.I 



—1.6 



—1.8 



—1. 8 



—1-5 



— I.I 



—0.8 



— °-5 



■ — 0.4 



—1.05 



^m 2a 9a 



—0.4 



— 0.2 



+0.1 



+0.2 



+O.I 



+0.1 



+0.2 



+0.2 



+0.2 



— 0.1 



— 0.2 



— 0-3 



O.OI 



6^ 2, lOj 



— 0.2 



0.0 



+0-3 



+0.5 



+0-S 



+0.5 



+0.6 



+0.6 



+0.6 



+0.2 



—0.1 



— 0.2 



+0.2S 



7m N. 6^ 



— 0-5 



—0.6 





—1-7 



—2.4 



—2.7 



—2.6 



— 2.2 



—1-7 



— I.I 



— 0.6 



— 0.4 



—1-45 



7m 'a 8a 



-- 0.3 



— 0.2 



— 0.4 



—0.6 



— 1.0 



— 1.2 



— 1.2 



—0.8 



—0.6 



—0-5 



■ — °-3 



—0.3 



—0.62 



7m 'a 9a 



— 0.2 



0.0 



+0.1 



• — 0.1 



— 0.4 



—0.6 



— 0-5 



— 0.2 



— 0.2 



— 0.2 



— 0.1 



— 0.2 



— 0.22 



7m 2a 5a 



— 1-3 



—1.6 



— 2.0 



—2.9 



-3-6 



—3-7 



-3-6 



—2,-Z 



— 3-0 



— 2.2 



—1-3 



— I.I 



-2.46 



7m 2, 6^ 



— 1.0 



— I.I 



—1.4 



— 2-3 



■ — 3-° 



—3-2 



—3-1 



—2.7 



—2-3 



—1.6 



—0.9 



—0.8 



-1-95 



7m 2a 7a 



—0.7 



—0.7 



— 1.0 



— i-S 



— 2.1 



—2.4 



—2-3 



—1.8 



—1.4 



— i.i 



— 0.6 



—0.6 



—1.36 



7m 2a 9a 



— 0-3 



—0.2 



— 0.2 



— 0.4 



—0.7 



—0.8 



—0.7 



—0.4 



— 0.4 



— 0.4 



— 0.2 



— 0-3 



—0.41 



7m 3a 9a 



— 0-3 



— 0.2 



— 0.2 



—0.4 



—0.8 



—0.9 



—0.8 



— 0-5 



—0.4 



— °-3 



— 0.2 



— 0.2 



-0.43 



8m 2a 6. 



— I.I 



—1-5 



— 2.1 



—31 



-3-8 



—4.1 



—4.0 



-3-6 



—31 



— 2.2 



— 1.2 



—0.9 



—2.56 



