spare time in the office for any of the employees it should be devoted to accumulating, digesting, and putting in convenient form for use the results of previous investigations, and to doing such work as tabulating and recording on diagrams the weights of metal per lineal foot of span for bridges of all kinds.

Finally, in bringing this little treatise to a close the author feels that he cannot do better than to repeat from Chapter II the following principle: "The systemization of all that one does in connection with his professional work is one of the most important steps that can be taken towards the attainment of success."