This fourth volume of the critical edition of the medical aphorisms compiled by Maimonides (1138–1204) covers treatises sixteen to twenty-one. The central subjects of these treatises include women’s diseases, physical exercise, bathing, foods, and the consumption of drugs. Most of the aphorisms featured in this volume are based on the works of Galen, but Maimonides also quotes from other ancient and medieval physicians, including some whose work does not survive in any other source. This edition provides both the Arabic text and an authoritative English translation by Gerrit Bos in parallel-column format.