- Magic and drugs1
- Maimonides, Moses, 1135-12041
- Manicules1
- Manuscripts, Czech1
- Manuscripts, English1
- Manuscripts, European1
- Manuscripts, Greek (Medieval and modern)1
- Manuscripts, Judeo-Arabic1
- Manuscripts, Latin (Medieval and modern)1
- Manuscripts, Samaritan1
- Manuscripts, Yiddish1
- Marginalia1
- Massachusetts--Boston1
- Medical care1
- Medicine, Magic, mystic, and spagiric1
- Medicine, Magic, mystic, and spagiric--Formulae, receipts, prescriptions1
- Medicine--Study and teaching1
- Mercury1
- Meteorology1
- Monochord1