sentences:  These fields were described by the Arab geographer Abu al-Hasan 'Alī al-Mas'ūdī in the 10th century, and by Marco Polo in the 13th century, who described the output of those wells as hundreds of shiploads.The distillation of petroleum was described in detail by Persian chemists such as Muhammad ibn Zakarīya Rāzi (Rhazes) in the 9th century.There was production of chemicals such as kerosene in the alembic ("al-ambiq"), which was mainly used for kerosene lamps.