Magna Britannia, [76]

Magnetic Pole, [93], [124]

Magnetic iron ore, [198]-[201], [238]

Maguire, Capt. Rochfort, [100]

Manitoba, [186], [231]

Mansfield island, [36], [37], [69], [77], [113], [187]

Mansell island, [77]

Marble island, [79], [84], [85]

quartzites, [198], [199]

Marine shells, [222]