Inundations, 44, 65, 123.

Iron, 102, 140.

Irrigation, 86, 157-161, 179.

Isle of Pines, 4.

Iztaccihnatl, 268.

Jacal, Mount, 95.

Jalapa, 317-321.

Jorullo, 92.

Judas, 50.

Judas’s Bones, 49.