Mechanical equipment of buildings: By Louis Allen Harding, D.S., M.E., and Arthur Cutts Willard, S.B. Volume I, Heating and Ventilation, a reference book for engineers, architects and contractors. Second edition, revised and enlarged. x–963 pages, illustrations, 8vo, imitation leather. New York, John Wiley & Sons, Inc., 1929.Price, $10.00