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APPENDIX Forcomparisonthedivisionofthe24-hourdayintowatering periods,asgiventomebyMrMul_lammadA.MuI:iammadofthe AgriculturalTrialStationatRasal-Khaymahin1964,isquotedbelow. Hereeachgardenhasalongestablishedcustomaryrighttoaknown numberofqiyasat(singularqiyas),measures,thesupervisionof whichisentrustedtoasaq_qa'i.Thelatterreceivespaymentofa maundortwoofdatesdependingontheareaofthegarden concerned.Thedayisreckonedfromsunset,andthereare48qiyas in24hours,buttheyarenotofequallength.