WORK OF BELLE FOURCHE EXPERIMENT FARM. 



17 



Table I.— Summary of climatological observations at the Belle Fourche Experiment 



Farm, 1908 to 1912, inclusive. 



Precipitation (Inches). 



Evaporation (Incurs). 



Daily Wind Velocity (Miles per Hour). 



Temperature (°F.). 



Monthly mean. 



do 



do 



do 



do 



Monthly maxi- 

 mum 



do 



do 



do 



do 



Monthly mini- 

 mum 



do 



do 



do 



do 



12 

 18 

 20 

 12 



50 

 45 

 59 

 44 



-24 

 -19 

 -22 

 -32 



23 



8 



22 



25 



51 

 46 

 61 

 49 



-19 

 -26 

 - 7 

 -12 



32 

 46 

 39 

 19 



65 

 87 

 78 

 70 



12 



22 



8 



-15 



48 

 38 

 51 

 43 

 47 



89 

 73 



78 



5 

 6 



24 

 7 



22 



52 



52 

 52 



58 

 55 



84 

 81 

 90 

 84 



29 

 22 

 27 

 23 

 32 



63 

 66 

 68 



73 



66 



90 



95 



108 



101 



101 



39 

 45 

 36 

 43 

 39 



73 

 70 

 76 

 71 

 70 



100 



ino 



109 



105 



94 



43 

 41 

 44 

 41 

 40 



68 

 75 



lis 

 65 

 68 



Kll 

 105 

 llll 

 100 

 95 



39 



45 

 32 

 32 

 47 



64 

 61 

 59 



59 

 52 



105 

 96 

 97 

 94 

 94 



22 

 31 

 30 

 35 

 24 



45 

 46 

 51 

 43 

 45 



82 

 si 

 91 

 82 

 85 



22 

 11 



13 

 - 1 



• )•> 



37 

 31 

 31 

 25 

 38 



75 

 73 

 67 

 58 

 70 



- 8 

 11 



22 

 10 

 25 



20 



2S 



49 

 49 

 52 



51 

 57 



-12 

 -23 



-13 

 -25 



9 



[Cir. 119] 



