GRAZING EANGES IN" SOUTHEEIsr AEIZONA, 



Table I. — Precipitation, in inches, at MacBeatlVs place and at McCleary's place, 

 Santa Rita Range Reserve, Ariz., by months, 1909 to 1914, inclusive.^ 



Macbeath's place. 



Month. 



1909 



1910 



1911 



1912 



1913 



1914 



Average, 



January • 1 



1.69 

 



.13 

 

 



.57 

 4.64 

 3.94 

 1.02 



.26 

 1.43 



.18 



1.40 



2.03 



.26 



.18 



.38 



2.04 



5.05 



2.96 



3.79 



2.27 



.04 



1.S3 







.70 



5.18 



.62 



.24 



.27 



5.89 



3.69 



.70 



.99 







1.38 



0.93 



3.71 



.60 



.23 



.40 



.42 



5.15 



4.58 



1.94 



.58 



3.33 



.82 



0.60 

 .75 

 1.29 

 

 ,, .05 

 3.44 

 4.09 

 6.48 

 4.08 

 3.45 

 2.56 

 7.39 



0.92 



February 1 



1.44 



March 





1.49 



April 





.20 







.21 





0.85 



6.45 



4.90 



2.17 







1.03 



1.36 



1.27 



July 



5.21 





4.43 



September . . 



2.28 





1.29 





1.90 





2.16 







Total. 





13.86 



22.23 



19.66 



22.69 



34.18 



22.80 









McCLEARY'S PLACE. 



January . . . 

 February.. 



March 



April 



May 



June 



July 



August 



September . 

 October. . . 

 November. 

 December . 



Total. 



0.28 



1.71 



1.15 







0.86 



0.37 



1.22 







2.06 



.58 



2.98 



.55 



1.98 



.81 



.21 



3.64 



.62 



1.09 











.38 



.65 



.30 















.16 



.20 



.60 



.08 



.30 



.69 



1.51 



.56 



.86 



1.55 



6.40 



5.10 



8.40 



8.63 



3.64 



5.03 



7.03 



4.41 



1.17 



3.49 



3.51 



3.74 



3.21 



.51 



1.53 







.67 



1.21 







.26 



1,95 



1.55 



.02 



3.11 



1.12 



1.55 



.10 



.10 



3.11 



3.40 



1.40 



.16 



1.91 



.48 



.83 



6.67 



22.94 



15.20 



20.56 



19.88 



18.00 



26.80 



0.73 

 L23 

 1.39 



.22 

 .17 

 .91 

 6.20 

 3.89 

 1.19 

 1.15 

 1.56 

 1.91 



20.55 



1 The observations recorded in this table were not made by regular United States 

 Weather Bureau observers, though United States standard rain gauges were used. The 

 readings were made with the standard measuring stick between 6 and 8 o'cloclv the morning 

 after the rainfall occurred. 



A study of these data shows that the average annual rainfall at 

 MacBeath's (elevation about 5,000 feet) has been about 11 per cent 

 greater for 5^ years than at McCleary's (elevation about 4,000 feet), 

 although the two stations are only about 3 miles apart on a straight 

 line. They also show that the precipitation bj^ months at McCleary's 

 has been greater than at MacBeath's 26 out of the 66 months of the 

 record. 



For 1914 records were obtained at Mr. Robinson's camp (eleva- 

 tion about 4,500 feet) that are valuable for comparison with the 

 others. Records for the last four months of 1914 were also made at 

 Rosemont (elevation, 5,000 feet), 9 miles away as the crow flies, on 

 the other side of the mountain range. It is impossible to present 

 the daily records for these different stations in any sort of diagram 

 that could be printed here, but a study of the records by clays brings 

 out one or two generalizations which are of some importance. 



The first and most noticeable of these is the exceedingly restricted 

 areas over which the rain falls at any one time. It must be under- 

 stood that the most of the rain that falls in the region, particularly 

 that of the so-called rainy season of summer, comes as local showers 



