150 TABLES OF DIFFERENCES OF MEAN TEMPERATURES. 



Jan. 



Apr. 



May. 



June. 



July. 



Sept. 



Washington City, U. S. Naval Observatory.^ Lat. 38° 54'. Long. 77° 03' W. of G. 



Alt. no feet. Jan. 1862, to Dec. 1869, inclusive. 





























(J 







Mdn't 



— 2.12 



—2.72 



— 3.01 



— 4.00 



—4.91 



—4.94 



— 5.02 



—4.99 



3 



—3.22 



—4.02 



—4.46 



—6 



26 



—7 



17 



—6.89 



-6.73 



—6 



57 



6 



—4. 1 1 



—4.89 



—5-57 



—7 



09 



—7 



1° 



—6.99 



-7.J6 



—7 



49 



9 



2.21 



-1.84 



—1.23 



— 



o-; 



+0 



66 



+0.90 



4-0.69 



+° 



10 



Noon 



+ 4.22 



+4-55 



+4.58 



+ S 



7^ 



+ 6 



57 



+ 6.74 



+6.99 



+ 7 



51 



3 



+ 5-76 



+6.66 



+6.79 



+7 



79 



+s 



So 



+8.22 



+8.41 



+9 



52 



6 



+ 2.03 



+ 2.73 



+ 3-<^3 



+4 



55 



+4 



80 



+4.69 



+4.95 



+3 



98 



9 



—0.38 



—0.43 



—0.70 



—068 



-1.47 



—'•75 



—2.13 



-1.84 



Comb's 



















3.9.3.9 



— O.OI 



+0.09 



4-O.IO 



+0 



20 



+0 



20 



+0.12 



4-0.06 



+0 



30 



—4.76 

 -6.36 



—7-35 

 + 1-53 

 + 7.67 



+9-41 



-(-2. 38 +2.09 



2.56 3'.02 



+0.50 



—4-03 

 -5.84 

 —7-03 



—0-39 

 +7.87 

 +9-38 



+0.28 



— 3-03 

 -4.62 

 -5.56 

 -1.56 

 + 6.62 

 + 7.56 

 + 1-83 



4-0.04 



+4 

 + 5- 

 + 1 



73 



—3 



81 



— 5 



66 



—6 



6S 



— 



21 



+6 



21 



+7 



32 



+ 3 



89 



— I 



+0.15 



Fort Morgan 



Mobile Point, Alabama. Lat. 30° 



14'. Long. 88° 01' W. of G. 









Alt. 20 



feet. 1 



851 to Feb. 1853, inclusive, June 



1848 to 



1850. 1 



Mdn't 



—1-3 



— 1.0 



—0.1 



—2.4 



—1-7 



— 1.8 



—1.8 



-2.2 



—1.5 



—0.9 



—0.7 



—0.9 



—1.4 



I 



—1.4 



—1-3 



—1.4 



—3-4 



— 2.1 



—2.4 



— 2.2 



— 2.1 



—1-7 



— I.I 



— 1.0 



—0.9 



—1.8 



2 



—1.6 



—1.6 



— i.S 



—31 



— 2.7 



—2.6 



—2.6 



—2-3 



—2.4 



—1.7 



—1-3 



— 1.2 



— 2.1 



3 



—1.8 



— 2.0 



—1.9 



—41 



—3-2 



—2.8 



—2.8 



—2.7 



—2.8 



—2-3 



—1-7 



-1-7 



—2.5 



4 



— 2.1 



—2.3 



—2.7 



—31 



—3-5 



—2.6 



— 3-2 



—2.8 



—3-4 



—3-0 



— 2.2 



— 2.1 



—2.8 



s 



—2.4 



—2.8 



—3-1 



—3-3 



—3-7 



—2.9 



—3-3 



-30 



-3-8 



—3-4 



—2.6 



—2.4 



—3-1 



6 



—2.6 



—3-2 



-3.6 



—3-4 



-3-6 



—2.6 



—2.8 



—2.6 



—41 



-3-6 



—3-2 



—2.6 



—3.2 



7 



—3-1 



-3-6 



-3-3 



— 2.1 



—2.6 



-i-S 



—1.8 



— 2.0 



—3-4 



—3-1 



—3.4 



—2.9 



—2.7 



8 



—1.9 



—2-5 



— 2.2 



— I.I 



-i-S 



— 0.2 



—0.9 



—0.8 



. — 2.1 



_2.6 



—2.6 



— 2.2 



—1.7 



9 



—0.8 



—0.7 



—0.8 



+0.1 



— °-3 



+0.9 



+0.2 



+0.3 



— 0.7 



— 1.3 



—1.7 



—1.4 



-0.5 



10 



+0-S 



+°-3 



+0.2 



+ 1-4 



+0.7 



+2.0 



+ 1-3 



+ 1-7 



+0.8 



0.0 



— 0.6 



■ — 0.1 



4-0.7 



II 



+ 1.6 



+ 1-5 



+ 1-3 



+2.5 



+ 1-5 



+ 2.S 



+2.8 



+2.8 



+2.0 



+ 1.0 



4-0.5 



4-0.9 



4-1.7 



Noon 



+2.3 



+2.5 



+2.3 



+ 3.6 



+2.4 



+2.9 



+3.2 



+3-5 



+2.8 



+2.1 



+ 1.6 



4-1.5 



+2.6 



I 



+2.8 



+3-2 



+2.7 



+4-1 



+3-S 



4-3.2 



+4.0 



+42 



+3-6 



4-2-9 



4-2.5 



+2.3 



4-3.3 



2 



+3-1 



+3-7 



+3-1 



+4-3 



+4-1 



+3-4 



+43 



+41 



4-4-0 



4-3.7 



4-3-4 



4-3.0 



4-3.7 



3 



+ 3-1 



+3-5 



+3-4 



+4-3 



+4.3 



+3-3 



+3.6 



4-3-4 



+4.4 



4-3.9 



4-3-8 



4-3.3 



+3-7 



4 



+ 2.8 



+ 3-0 



+3-3 



+4.2 



+3-9 



+2.9 



+3-0 



4-3-I 



+4.0 



+3-7 



4-3-5 



+2.8 



4-3.3 



5 



+ 1-7 



+2.4 



+ 2.7 



+ 2,8 



+2.7 



+ 1-9 



+ 1.9 



+2,2 



4-3-3 



4-2.7 



+2.5 



4-1.9 



4-2.4 



6 



+ 1.1 



+ 1-4 



+ 1-4 



+ 1-5 



+ 1.6 



+ 1.1 



+ 1.0 



4-1. 1 



+1.8 



4-1-4 



4-1.5 



4-1.2 



4-1.3 



7 



+0.7 



+0.6 



+0.6 



+0.5 



+0.7 



0.0 



0.0 



— 0.2 



+0.8 



+0.8 



+ 1.1 



+0.8 



4-o.s 



8 



+0.2 



+0.3 



+0.3 



+0.1 



+0-3 



— 0.6 



—0.6 



— 1.0 



+0.2 



+0.6 



+0.6 



4-0.5 



+0.1 



9 



+0.1 



— 0.2 



0.0 



— 0.3 



0.0 



—0.9 



—0.9 



—1.5 



0.0 



4-0-3 



+0.2 



+0.2 



— 0.2 



10 



—0.3 



—0.4 



— 0-3 



— o.S 



—0.6 



— i-S 



— I.I 



—1.7 



—0.7 



+0.1 



—0.1 



+0.1 



—0.6 



II 



— I.O 



—0.7 



—0.7 



—2.6 



— I.I 



—1.6 



—1.4 



— 2,0 



— I.I 



— 0.3 



—0.4 



^0,3 



— I.I 



Comb's 





























10, 10 



+0.1 



0.0 



0.0 



+0.3 



0.0 



+0.2 



+0.1 



0.0 



0.0 



0.0 



—0.3 



0.0 



0.0 



6,2,9 



+0.2 



+0.1 



— 0.2 



+0.2 



+0.2 



0.0 



+0.2 



0.0 



0.0 



+0.1 



+0.1 +0.2 



+0.1 



6, 2, 10 



+0.1 



0.0 



—0-3 



0.0 



0.0 



— 0.2 



+0., 



— 0.1 



—0.3 



+0.1 



0.0 +0.2 



0.0 



7,2,9 



0.0 



0.0 



— 0.1 



+0.6 



+0.5 



+0.3 



+0.5 



+0.2 



+0.2 



-fo.3 



+0.1 +0.1 



-fo.3 



7.2.9 m, 



0.0 



— 0.1 



0.0 



+0.4 



+0.4 



0.0 



+0.2 



— 0.2 



4-0.1 



+0.3 



+0.1 +0.1 



+0.1 



3.9.3,9 



+0.1 



+0.1 



+0.2 



0.0 



+0.2 



+0.1 



0.0 



— 0.1 



+0.2 



4-0-1 



+0. 1 +0. 1 



1 



+0., 



' The 



differenc 



es in thi 



5 table d 



epend or 



the assumption that the 



mean of 



8 equidi 



Btant observations represents the 



daily me 



in, whic 



1 is only 



an appr 



3ximatio 



1 to the truth. 









