INDEX. 155 



Page. 



Winter, resistance of date palm to cold 59-60 



Wolfskil 1 date, failure in reproduction by seedlings 20 



notes 31,49,63,124 



Yield of date palms in pounds, and continuance of bearing 26 



dates, remarks 136-138 



sunken gardens, and value of trees 70 



Deglet Noor date 35 



Hamraya date 37 



Yuma, Arizona. See also Arizona arid Salton Basin. 



advantages for irrigation 87 



date culture, conditions 131 



9 



Zab, Western, date region in Sahara, description, etc 78 



Zero point for date culture 63-64 



o 



