INDEX. 153 



Page. 



Salton Basin, Cal., geography and geology 101 



irrigation and water supply 12, 104 



name, use 12 



need of late sorts of dates, note 43 



opening for date culture 33 



Palm Canyon, comparison of soil with Sahara 112 



profits of date culture, estimates 136 



record of rainless months 56 



region, promising, for date 67, 122 



seedling date orchards, advisability of planting 18 



similarity of conditions to Fougala, Algeria 83 



to M'rai'er and Oued Birh regions, Sahara 88, 111 



sum of mean maximum temperatures. < 68 



mean temperatures 66 



temperature curves. 63-64 



treatment of alkali land in date culture 47 



variation in temperature 59, 60 



warmth of water for irrigation of dates 50 



winter cold greatest danger to date 60 



San Diego, date, failure to ripen 125 



Joaquin and Sacramento valleys, date culture, probable success 123 



Sandy soil, usefulness for dates, notes 107, 108 



Sayer date, note 



Schweinfurth, Dr. Georg, claim as to influence of male date on seed 



Season for setting out date palm offshoots ^ 21 



of flowering (bloom) of date 16, 27, 54 



male date palm, relation to pollination 23 



Secretary of Agriculture, inauguration of date study and introductory plantings 41 



Seed and Plant Introduction anjd Distribution, Office, aid in study of date 41 



of date, peculiarties of germination 19 



Seedling date palms, growing near Yuma, Ariz 131 



management in nursery, suggestions 19 



dates, failure of reproduction true to type, note 19 



in Arizona 32,128 



of Mexico, probable value in United States 136 



palms in propagation of date, discussion 18-20 



Seeds of date, Deglet Noor, notes 33 



importance to value of fruit 28 



varietal characteristics 24 



Seewahdate, note 32,61,129 



oasis, origin of wahi date, note 



Seidell, Atherton, analysis of Sahara soils for alkali 73 



Setting out date palm. See Planting. 



Sex of date palm, determination 29 



"Shamel," hot wind of Persian Gulf, damage to dates 71 



Shelter, for other fruit trees, value of date palm 43 



Shipment of date palm offshoots, success 20-21 



Simoons, effect on date palm 70-71 



Sirocco, effect on date palm 70-71 



Sodium sulphate, relations in soil water in Sahara 74 



"Softdates," description 30 



Soil conditions in Salton Basin, discussion 106-111 



moisture, means of determining in study for date palm 75 



reaction in relation to date culture ~ 119 



samples near Palm Spring, Cal. , analysis Ill 



Soils, Bureau, relation to date growing of researches in Salton Basin, Cal 12 



study of soils of Sahara for alkali, cooperation 73 



of Sahara, investigation of alkali in relation to date culture 73-99 



Salton Basin, analyses; fertility 113, 114 



results of analyses at ten Saharan stations 96 



Tempe, Ariz., analyses '. 100 



used in date raising on Persian Gulf 109 



water content in relation to alkali 75 



Spain, introduction of date growing 17 



Springs and wells, irrigation of dates in alkali deserts, Algeria 78-80 



Subsoil, alkali, importance in date growing 116 



Suckers. See Offshoots. 



