26 JANUARY 1918, Page 23

The Military Map — Additional Chapters. (Macmillan and Co. 3s. net.l—Had not

Professor John Marr already given his popular book on Physical Geography the happy title of The Scientific Study of Scenery, this title would have served admirably for the present volume and given a good idea of its aims and scope. It sets out to elucidate the " Elements of Modern Topography " according to the French school of war, and very ably and clearly it does it. As the basis for lectures on, say, " The How and Why of the Earth's Crust," " Inductive Reconnaissance," or " The Compleat Topo- grapher," the book should prove a most valuable stock-pot to all officers instructing in such subjects. Apt and illuminating analogies are freely instanced, whilst the simple line-diagrams are commendably fool-proof and well adapted for blackboard reproduction. It is rare and refreshing to find a technical subject treated with so light a touch, and without a trace of that tediousness peculiar to " Official Manuals."