CORRELATION OF DISTRIBUTIONAL FEATURES. 



413 



Table i2.— Climatic extremes for region with 1 to 4 species of evergreen broad-leaved trees 



(East) — Continued. 



Plate 

 63 

 64 



68 

 69 

 60 



63 



65 



66 



68 



69 



70 

 71 

 72 



Evaporation: 



Daily mean, 1887-88, /« (inch) 



Total annual, 1887-88 (inches) 



Moisture ratios: 



Normal P/E, /« 



Normal v/E, fs 



Normal P/E, year 



Vapor pressure: 



Normal mean, fs (hundredths inch) 



Humidity: 



Normal mean, fs (per cent) 



Normal mean, year (per cent) 



Wind: 



Normal mean hourly velocity, fs (miles) . . 

 Sunshine: 



Normal total duration, fs (hours) 



Moisture-temperature indices: 



Normal P/E XT, fs, remainder method . . . 



Normal P/E XT, fs, exponential method. . 



Normal P/E XT, fs, physiological method 



Low. 



.081 

 20.3 



.34 

 .13 

 .24 



300 



37.0 

 38.8 



5.0 



1,626 



98 



906 



1,790 



High. 



.180a 

 96.4 



1.39 

 1.63 

 1.85 



675 



84.0 

 82.1 



14.9 



2,343 



887 

 10.331 

 20,570 



Table 43 — Climatic extremes for region with 1 to 4 species of evergreen hroad-leaved tree s 



(West). 



Plate 

 34 

 36 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 46 



46 

 47 

 48 

 49 

 60 

 61 

 62 



63 

 64 



68 

 69 

 60 



63 



66 

 66 



68 



69 



70 

 71 

 72 



Temperature: 



Days in normal frostlesa season (fs) 



Hot days, fs 



Cold days, fs 



Remainder simamation above 32°, year (thousands) 



Remainder summation above 39°, fs (thousands) . . . 



Exponential summation, fs (hundreds) 



Physiological summation, fs (thousands) 



Absolute minimum 



Normal daily mean, coldest 14 days of year (°F.) . . 



Normal daily mean, hottest 6 weeks of year (°F.) . . 



Normal daily mean, year (°F.) 



Precipitation: 



Normal daily mean, fs (inch) 



Normal No. rainy days (over 0.10 inch), fs 



Normal No. dry days (0.10 inch or less), fs 



Dry days, percentage of total, fs (per cent) 



Days in longest normal rainy period, fs 



Days in longest normal dry period, fs 



Mean total, year (inches) 



Evaporation: 



Daily mean, 1887-88, fs (inch) 



Total annual, 1887-88 (inches) 



Moisture ratios: 



Normal P/E, fs 



Normal ir/E, fs 



Normal P/E, year 



Vapor pressure: 



Normal mean, fs (hundredths inch) 



Humidity: 



Normal mean, fs (per cent) 



Normal mean, year (per cent) 



Wind: 



Normal mean hourly velocity, fs (miles) 



Sunshine: 



Normal total duration, fs (hours) 



Moisture-temperature indices: 



Normal P/E X T, fs, remainder method 



Normal P/E X T, fs, exponential method 



Normal P/E XT, fs, physiological method 



1 



Low. 

 108 









 10.0- 



3.8 



4.3 



1.9 

 -6 

 39 



64.4- 

 50- 



.042 



1 

 72 

 27 





 56 

 20 + 



.052 

 18.1 



.29 

 .41 

 .88 



323 



60.0-« 

 74.6 



3.5 



,500-" 



126 



,000-" 

 ,313 



Hwh. 

 316 

 120 -<» 

 



18.0 + 

 8.0+« 

 8.0 + 



12.5 + 

 + 14 + 



50 +« 



78.8 + 



65 + 



.199 

 199 

 197 

 100 



99 

 198 



90 



.143 

 60 +« 



3.84 

 4.48 

 4.90 



329 



73.6 

 76.2 



16.4 



2,700±<» 



1,566 



11,724 



7,475 



