D INFORMATION FOR EMIGRANTS. 



There is, however, a limit to the extent of the arable lands fixed by the 

 amount of the annual rain-fall. Commencing with the Valley of the Red 

 River, where the annual deposition amounts to from seventeen to nine- 

 teen inches, the amount of rain-fall decreases, until in longitude io6° it 

 will scarcely exceed seven inches. Here we find a fact which sets a 

 limit to the western extension of the cultivated area of the United 

 States. 



The following tables, compiled from the records of the Smithsonian 

 Institution, can be found more in detail 'in the report quoted above on 

 the "Lands of the Arid Region," Chapter III: 



TABLE I. 



PRECIPITATION ON THE SUB-HUMID REGION. 



Stations. 



<;3 £ 





w 



Fort Totten, Dakota . . . 

 Fort Abercrombie, Dakota 

 Omaha Agency, Nebraska. 

 Fort Riley, Kansas. . . . 

 Fort Hays, Kansas. . . . 

 Fprt Larned, Kansas . , . 

 Fort Griffin, Texas. . . . 



57° 56' 

 46° 27^ 

 42° oY 



39° 03^ 

 38° 59' 

 38° 10' 



32° 54' 



99° 16^ 



96° T.V 

 96° 22^ 



96° 35' 

 Q9°. 20'' 

 98° 57' 

 99° 14' 



16.44 

 18.78 



25-58 

 24.52 

 22.70 

 21.42 

 21.51 



5y- 

 13 y- 



5 7- 

 20 y. 



5y- 



10 y. 



5y- 



5 m. 



6 m. 



2 m. 



10 m. 



2 m. 

 9 m. 



3 m. 



It must be borne in mind, in studying the above table, that this is the 

 average for a number of years. In dry 5''ears the average will be much 

 less ; but it will be seen that the general average is less than is requisite 

 for successful agriculture : 



TABLE II. 

 PRECIPITATION OF THE ARID REGION. 



Stations. 





Albuquerque, New Mexico 

 Camp Mohave, Arizona. . 

 Denver, Colorado . . . 

 Fort Lyon, Colorado . . . 

 Fort McPherson, Nebraska 

 Fort Rice, Dakota .... 

 Fort Randall, Dakota. . . 

 Fort Stockton, Texas. . . 

 Fort Belknap, Texas . . . 



j5 



-.-7° 



06^ 



3" 46' 

 39° 45' 

 38° 08^ 

 41° 00^ 

 46° 32^ 

 43° 01^ 

 ■\o° 20' 



38' 

 36' 

 01^ 

 50' 



30' 



-,^/ 



98° 37' 



102° 30' 



98° 46^ 



106^ 

 111= 



105' 

 102^^ 

 100^ 

 100*^ 



8. II 



4.65 

 i3-7f 

 12.56 

 18.96 

 "•39 

 15-52 

 II .50 

 28.05 



12 y. 



9y- 



5y- 

 7y- 



6y. 

 6y. 



15 y- 

 5 y- 



5y- 



2 m. 

 I m. 

 I m. 

 9 m. 

 9 m. 

 I m. 

 6 m. 

 8 m. 

 10 m. 



