CORRELATION OF DISTRIBUTIONAL FEATURES. 



445 



Table 90. — Climatic extremes for Abies balsamea — Continued. 



Plate Evaporation: 



53 Daily mean, 1887-S8, fs (inch) 



54 Total annual, 1887-88 (inches) 



Moisture ratios: 



58 Normal P/E, fs 



69 Normal tt/E, fs 



60 Normal P/E, year , 



Vapor pressure: 

 63 Normal mean, fs (hundredths inch) 



Humidity: 



65 Normal mean, fs (per cent 



66 Normal mean, year (per cent) , 



WiTid: 



68 Normal mean hourly velocity, fs (miles) . . 

 Sunshine: 



69 Normal total duration, fs (hours) 



Moisture-temperature indices: 



70 Normal P/E X T, fs, remainder method . . . 



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



72 Normal P/E X T, fs, physiological method 



Table 91. — Climatic extrem.es for Quercus alba. 



Plate Temperature: 



34 Days in normal frostless season (fs) 



35 Hot days, fs 



36 Cold days, fs 



37 Remainder summation above 32°, year (thousands) . 



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



39 Exponential summation, fs (hundreds) 



40 Physiological summation, fs (thousands) 



41 Absolute minimum 



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



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



45 Normal daily mean, year (°F.) .' 



Precipitation: 



46 Normal daily mean, fs (inch) 



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



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



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



50 Days in longest normal rainy period, fs 



51 Days in longest normal dry period, fs 



52 Mean total, year (inches) 



Evaporation: 



53 Daily mean, 1887-88, fs (inch) 



54 Total annual, 1887-88 (inches) 



Moisture ratios: 



58 Normal P/E, fs 



59 Normal ir/E, fs 



60 Normal P/E, year 



Vapor pressure: 



63 Normal mean, fs (hundredths inch) 



Humidity: 



65 Normal mean, fs (per cent) 



66 Normal mean, year (per cent) 



Wind: 



68 Normal mean hourly velocity, fs (miles) 



Sunshine: 



69 Normal total duration, fs (hours) 



Moisture-temperatxire indices: 



70 Normal P/E X T, fs-, remainder method 



71 Normal P/E X T, fs, exponential method 



72 Normal P/E X T, fs, physiological method 



