INTRODUCTION. 



21 



Cincbinati, Ohio.— Lai. WG', alt. 620.42 feet. 



Mean annual tempeniture (8 years) 55°3. 



Total annual rainfall (8 years) 42.39 inches. 



Baltimore, Md.— hut. 39"28', alt. 45. i 9 feet. 



Mean annual temperature (8 years) 55°S. 



Total annual rainfall (8 years) 42.46 feet. 



St. Louis, Mo.— Lat. 38"37', alt. 5G7.67 feet. 



Mean annual temperature (8 years) 55'5. 



Total annual rainfall (8 years) 89.67 inches. 



Washiugton, D. C.—Lnt. 38"53', alt. 10o.5G feet. 



Mean annual temperature (9 years) 55°1. 



Total annual rainfull (9 years) 42.73 inches. 



II. Comparative mean moiitlUy and annual temperature and rainfall 

 at Cairo, Illinois, ("lat. 87°0', alt. 377.35 ft. J and Norfolk, Virginia 

 Clat. 36°51', alt. 54.50 ft. J, for 10 years. 



Maximnm Mean Annual Temperature for 10 Years. 





= O 



S'o 



3 O" 







i 



> 



■a 



S3 

 •< 



B 



? 





c 

 B 



■a 

 B 



O 



a- 



5! 

 o 



< 



B 



B 



B 



b| 



B 



Cairo 



Noifolk 



1878 

 1876 



39.8 

 47.7 



1 

 44.7 57.8 

 45.0,46.5 



G4.3 

 55.3 



(58. 1 

 65.7 



73 9 

 78.1 



S2.7 

 81.7 



81.2 70.fi 



78.ai69.7 



1 



59 

 .W.8 



50.1 

 49.4 



33.2 

 :«.6 



59.02 

 58.92 



Minimum Mean Annual Temperature for 10 Years. 



o vi c'*:' 



Average Mean Annual Temperature for 8 Years. 





Mean 



A nnna 



I II 



ain 



fall fo 



• 10 Years. 

















«H 



**i 



g 



> 



s 



en 



5H 



0- 



00 



C 



!?! 



H 



H 









s 



a" 



e: 





p 



B 



•< 



P 



n 



a 





o 



< 





o 













B- 













P 





B 



B 











*< 



•< 















cr 



1 



T 















2 97 



.1 .'.0 



4.39 



4.31:3 80 



4 64 



3 38 



2 88 



2 51 



3 02 



4. 063. 42 



42 83 



Norfolk 







;t 5u 



3.0.; 



4.21 



3. 9813 27 



4.02 



o.Sb 



6.36 



4.91 



3.69 



3.83l4 3d 



50 54 















*The comparative rainfall of the two localities, us s'veii in the report of the Chief 

 Signal Officer for 1880, is as follows:— 



