<p style='text-align: justify;'>Passage from Ḥunayn ibn Isḥāq, Al-masāʾil fī l-ṭibb (‘Questions on medicine’), a medical treatise in the form of questions and answers, here dealing with the periodicity of diseases and pulse (ed, Abū Rayyãn. Cairo 1978, pp. 211-215).</p>