FISHERIES, GAME AND FORESTS. 



409 



The author's present view is that final results will not be obtained until studies 

 extending over a considerable number of years have been made, not only of the run-off 

 of the streams from similarly situated contiguous areas, the one forested and the other 

 deforested, but of the meteorological conditions of such areas, including temperature, 

 dew point, humidity, vapor pressure, precipitation, and wind velocity. By way of 

 illustrating how these several elements vary in different parts of the United States, the 

 following tabulation has been compiled from the Annual Reports of the Chief of the 

 United States Weather Bureau for the years 1891-96, inclusive, the places therein 

 given, at which complete observations have been kept, being selected with reference 

 to showing what considerable variations in these elements prevail in different parts of 

 the United States. It may be noted in passing that temperature, dew point, humidity, 

 vapor pressure, precipitation, and velocity of wind, are the elements determining the 

 intensity of evaporation. 



Table Showing Mean Variation of Years 1891 to 1896, Inclusive, in Meteoro- 

 logical Conditions in Different Parts of the United States. 









t. 



p 



H 



DEW 



POINT 



RELATIVE 

 HUMIDITY 



VAPOR 

 PRESSURE 







H 





BRACE 

 LOCITY 



Name op Place 



< 2 



- H 

 « p. 



s 



a 



< 



00 



GO 



3 

 ■i 



CO 



00 



< 



CO 



i ■ 



CO 



s 







a 

 a! 



CM 



> > 



1 s 



2 g 





F° 



F° 



F° 



Per ct. 



Per ct. I 



riches 



Inches 



Inches 



Miles 



Abilene, Texas, 



63.8 



47-3 



45-3 



7 6 -3 



1 

 48.O 



374 



■34° 



23 -79 



II .O 



Albany, N. Y., 







48 



5 



39 



2 



40 



8 



80 



3 



73-5 



292 





3°3 



34 



12 



7-7 



Block Island, R. I 



? 





49 







42 



7 



44 







81 







82.3 



320 





33 2 



43 



03 



16.4 



Boston, Mass., 







49 



5 



39 



1 



40 



8 



73 



3 



72.7 



282 





299 



39 



3 2 



12 3 



Buffalo, N. Y., 







47 







38 



1 



38 



7 



74 



7 



7°-5 



270 





276 



37 



2 5 



11. 9 



Cleveland, Ohio, 







49 



4 



39 



6 



4i 



3 



77 







71.0 



290 





3°5 



3 2 



64 



12 . 1 



Denver, Col., 







49 



8 



2 5 



7 



26 



2 



57 



3 



38.0 



\S° 





159 



14 



66 



7-7 



El Paso, Tex., 







63 



4 



3° 



8 



24 



7 



49 



3 



23.8 



206 





166 



7 



1 1 



9-7 



Los Angeles, Cal., 





61 



9 



46 







5o 



8 



80 







64 -5 



33 1 





383 



14 



2 3 



3-6 



Oswego, N. Y., 





45 



8 



37 



2 



38 







77 



2 



72.8 



266 





268 



34 



7i 



1 1 . 2 



RAINFALL. 



Meteorology may be defined as, broadly, the study of the atmosphere, its 

 properties, motions and appearances, etc., an orderly arrangement of all the facts 

 relating thereto constituting the science of meteorology.* The consideration of 



* See Meteorology. By Thomas Russell, U. S. Engineer. Also, Meteorology; Practical and 

 Applied. By J. William Moore. 



