Co-operation is best established by the reference work which can to a large extent be created. For instance: One of the buyers in the supply department is dealing with two agents for rubber bands. The contract is a big one. There is much discussion as to which make of rubber band will live the longer. In self-defence, the buyer telephones the library for any information on rubber. Right here is the librarian's chance to make or mar. Perhaps this buyer has no library card, but at the eleventh hour has thought of the library as a last resource. There is one sure way to cure him of ever using the library again, and to persuade this time-pressed business man that the library is a plaything done up in red tape, and that is to send word to him that he must come personally to the library, sign an application, and wait for the book according to our library law. He will probably decide to take a chance on the merits of the rubber bands, and condemn the library as an agent of too slow blood for his purposes. The point is to get the information and to get it at once to the right man. If we can find something on our own shelves, a boy is sent with the book at once, even if he carries an encyclopaedia with him. If, as often happens, we are not so fortunate, a signal of distress is sent over the 'phone to the reference librarian at the main library, and she sends out material on the next delivery. Not only does this apply to the buyer of rubber bands, but to the chemist who wants material on fabrics, textiles, and lubricating oils; to the manager of the grocery department, on the blending of coffee; to the furniture buyer, on cabinet making and period furniture; to the head of the agricultural department on the silo and the traction engine; to the clerk in the shipping department, on parcels post; to the girl in the correspondence department, on punctuation; to the boy in the automobile repair shop, on the gas engine; and so on indefinitely. A memorandum of these requests makes a busy day for the weekly visit to the reference room at the main library. Books of interest on each particular subject are listed, even to government bulletins. We have even had intrusted to our care material from the public document department, and Mr. Legler's liberality has given us an economic value that will be the stepping stone to a new work, and make the library a factor to be reckoned with by the progressive commercial house.