418 



CORRELATION OF DISTRIBUTIONAL FEATURES. 



Table 50. — Climatic extremes for region with 88 or more species of evergreen broad-leaved 



trees (East). 



Plate 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 45 



46 

 47 

 48 

 49 

 50 

 51 

 52 



53 

 54 



68 

 59 

 60 



63 



65 

 66 



68 



69 



70 

 71 



72 



Temperature: 



Days in normal frostless season (/s) 



Hot days, fs 



Cold days, fs 



Remainder summation 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 X T, fs, physiological method 



Low. 

 340" 

 300 + 

 



26.0 + 



12.0" 



12.0 + 



25.0 + 

 +29 



60 + 



78.8 



75 + 



.106 

 161 

 150" 



30-" 

 112 



75-" 



50 + 



.140-" 

 50- 



.75 

 .75 

 .75 



700 



77. 

 77. 



8.0+" 



2,300+" 



1,155 

 10,877 

 23,000+" 



High. 

 365 

 365 

 



26.0 + 



14.5 



15.4 



31.1 

 +41 



69 



78.8 + 



75 + 



.160" 

 200" 

 204 



56 



150 +" 

 182 



60 + 



.141 

 51.6 



.80+" 



.80+" 



1.00+" 



707 



80. 0+" 

 80. 0+" 



9.7 



2,300+" 



1,200-" 

 11,000-" 

 23,266 



Table 51. — Climatic extremes for region with no species of Microphyllous trees. 



Plate 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 45 



46 

 47 

 48 

 49 

 50 

 51 

 62 



Temperature: 



Days in normal frostless season (fs) 



Hot days, fs 



Cold days, fs 



Remainder summation 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) 



