We have to acknowledge the third volume (for 1879) of
Professional Papers of the Corps of Royal Engineers. (Royal Engineer Institute, Chatham.)—The contents are of varied interest. The first paper is a lecture, delivered at the Institute two years ago, on the "Geogra-
phical Distribution of Animals." The editor judiciously directs attention to it, as suggesting to officers stationed abroad the oppor- tunities of scientific observation which come in their way. To Engineer officers, animals should be something more than creatures to be shot. The "Acoustical Limit of Dimensions of Rooms," by Lieutenant J. F. Day, deals with a subject of more than professional interest ; as also, in another way, does Major II. Helsham Jones's paper on "The History and Geography of Afghanistan, and the Afghan Campaign of 1838-9 and 1842."
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