Aɛraben ula d nutni aṭas i d-suqlen ladɣa idlisen uran yigrigiyen d yirumyen, seg lqern wis 15 aṭas i d-yessuqlen seg tlatinit. Ma yella deg lqern wis 17 iban-d unamek amaynut n tsuqilt am tmuɣli i d-yefka unagmay Roger Bacons i d-ibanen deg udlis iwumi isemma “tuccbiḥin tixeddaɛin”. Ma yella deg lqaren wis 20 d tallit n tegrawla timren i tebda tsuqilt tussnant i yiḍrisen.10