 This volume was prepared almost entirely by Cattell and furnishes in clear and condensed form a most interesting and valuable record of this great undertaking.It is not too much to say that the high mark of achievement set by this Congress was due in large degree to the excellent judgment and unremitting zeal with which Cattell undertook and carried through the duties of Secretary-Treasurer of the Committee of Management of the Congress.With the first call of the Government for the formation of an Engineer Officers' Reserve Corps early in 1917, Cattell enrolled and was commissioned a Major of Engineers on March 1, 1917.