I.
- Idiots, [286], [299], [309], [483]
- Imbeciles, [299]
- Inch Maree, [17], [18]
- Increase of lunacy, apparent, [232], [253], [260]
- Incubi, [36]
- Industrial system, [381], [382]
- Inspectors of the poor, action of, in boarding out, [385]
- International Medical Congress, [443]
- Invocation to periwinkle, [3]
- Ipswich Borough Asylum, [250]
- Ireland, [23], [393]
- ——, Dr., [304], [308]
- Ireland's Hogarth, [74]
- Irish Lunacy Inquiry Commission, 1878, [424-431]
- Island Bridge Asylum, [410]
- Itard, M., [301]
- Ivy ointment, [109]