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There is a particularly rich belt of titaniferous iron ore in the hills behind Sierra Leone.”

Titaniferous iron is an excellent thing in its way, and good for steel making; but it exists nearer home and in cheaper worked regions than Sierra Leone.

It is not in all regions only titaniferous iron; there are silver, lead, copper, antimony, quicksilver, and tin ores there unexploited, and which it would not be advisable to attempt to exploit until the so-called labour problem is solved.

Dol�erite, compact rock of the Basaltic series, but crystalline throughout, composed of augite and labradorite with some titaniferous iron ore and often olivine.

There is great similarity in the composition of the ancient and modern lavas of Etna, both consisting of felspar, augite, olivine, and titaniferous iron.