21 JANUARY 1911, Page 25

Nigeria and its Tin - Fields. By Albert F. Calvert. (E. Stanford.

3s. 6d.)—Tho tin of Nigeria is a recent discovery, between five and six years old. The ore varies considerably in richness, some of it cant:lining as much as 63.5 of metallic tin. Our readers may find all details at present available in Mr. Calvert's book. It is a matter of no little importance, for the world supply of tin was regarded as scarcely adequate to the demand.