Maxwell Reed succeeds in presenting science in such attractive and readable from that he succeeds in teaching painlessly whatever subject he tackles. This time it is geology, in its broader implications, and through the pages one spans the whole country, tracing down the riches nature has provided in earth itself, and giving not only the scientific and historical facts, but a good deal of industrial and economic interest as well. The splendid photographs, beautifully reproduced, tie the background of the ages, to the conditions of the present.