154 THE DATE PALM. 



Page. 



Sulphates, in Sahara in soils, notes (see also Analyses) 73, 87 



Salton Basin soil, showing of analyses 112, 113 



soil in Arizona, as shown in analyses ".. 100 



resistance of date palm 87, 119 



Sultani date, note 40 



Summers, hot, necessity for date culture 63-65 



Sunshine, necessity for date palm 58 



Table dates, remarks .. 30 



Tafi let, Morocco, excellence of dates, note 39 



Taylor, Col. Sam., experiments with seedling date trees 20 



Teddala date, notes 32, 33, 37, 132 



Tedmama date, note 32 



Tempe, Ariz. See Arizona. 



Temperature curves for date regions 63 



heat requirements of date palm 58-70 



high, necessity for fruiting of date 62 



inversion by cold-air drainage, relation to date culture 61 



limits of cold for date palms of varying age 60 



low, cold-air drainage, cause of injury to date 61 



endurance by date palm 59-60 



mean annual range in several date regions 59 



relation to growth of date fruit 52 



Temperatures, sums for date season at various desert stations 66, 68 



Tennessin date, note 32 



Texas, kind of date required 33, 61 



southwestern, date culture, probable success 134 



Thermometer, need of device for finding date needs exactly 67 



Thinning date bunches on tree, remarks 28 



Tidal irrigation of dates, remarks 48 



Timjooert date, notes 32, 37 



Tourney, Prof. James W. , study of date in Arizona 41, 127 



Trimming. See Pruning. 



Tunis, dates, suitable varieties for use in United States 133 



male date palm for late pollination 24 



United States, dates suitable for culture, discussion 30-44 



importation of dates 14, 138 



introduction of Persian Gulf and Saharan varieties of dates 41-43 



names and notes on dates of promise 39, 40 



regions of probable success of date culture 122-125 



southwestern, importance of hardy dates 61 



varieties of dates to be secured 38 



Wahi date, origin, quality, description 39 



Warm irrigation water for dates, advantages, discussion 49-50 



Water, alkaline, use for date palms 44, 52, 121 



amount needed for date palm, discussion 44-49 



artesian, irrigation of date palm 82, 84, 90 



Colorado Kiver, use for dates; composition 50, 105 



drainage, use in irrigation of date palm 98 



Salt River, composition 99 



warm, advantage for irrigation of date palm 49-50 



Weather, California, relation to date culture (see also Climate) 122-125 



rainy, disastrous effect on flowers and fruit of date 54 



Weevils, attacks on dates 31,39 



Wells and springs, irrigation of dates in alkali desert, Algeria 78-80 



Wheeler, Prof. H. L., experiments as to soil reaction, note 120 



Whitney, Prof. Milton, attention to analyses of date soils 11, 73, 111 



devising of instrument for determining soil moisture 75 



Wind, effects-on date palm, discussion 70-72 



pollination of date palm in wild state 26 



Winds, cold, effect on date culture in Algeria and Persia 71-72 



prevention of date culture on California coast 124, 125 



Salton Basin, protection by mountains 101-103 



sea, effect on date ripening in Mexico 135 



