Coal. By J. H. Ronaidson. (Murray. 6s. net.)—This is one
of the Imperial Institute's monographs on mineral resources, with special reference to the British Empire. It is an instructive oompilation from a large number of scattered papers, which are named in the Appendix. Of the estimated coal reserves of the world half are in the United States and nearly a fourth in the British Empire. Mr. Ronaldson describes in detail the coal supplies, both actual and probable, of each part of the Empire. Canada, with about a sixth of the world's coal, is by far the richest of the. Dominions. Our own coal reserves are relatively small, but they should last us for five or six centuries at the present- rate of output, and their quality is high. Next to the United States, China is richest in good anthracite and bituminous coal, though her output is trifling as yet.
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