The operation of this method is as follows: The sub─production orders are sent to the Transfer Clerk, who fills out two _Transfer Cards_, as shown in Fig. 26, one of which he sends with the order to the first department that is to do work on the order, and the other he retains. This card provides spaces for the various departments, which are designated by numbers. Following these are spaces for entering the dates of transfers, the entries being made with a rubber stamp. After these spaces are columns for the number of pieces of work received and the number of pieces delivered. When the first department has finished its work, the number of pieces is entered in the column headed _Pieces Delivered_, and the work and the card sent to the Transfer Office. The duplicate transfer card that was retained by the Transfer Clerk was filed in a compartment in a _Transfer Case_ corresponding to the department where the work began. He stamps the date of transfer on both cards, entering the number of pieces on his own, and sends the work on its way to the next department, together with the transfer card. His own card he removes from the compartment representing the first department, and places it in a compartment representing the department to which he has now sent the work. Subsequent transfers are made in the same manner, small lots of work actually being sent to the Transfer Office, but large lots or heavy and bulky work being sent directly from one department to the next, but under the personal direction of the Transfer Clerk or his assistant. When the parts are completed and ready for inspection, the Inspector is notified; and upon inspecting the parts previous to their being sent to the Finished Parts Store─Room, he enters the results of his work in the space at the bottom of the card that has accompanied the work in its progress through the departments. [Illustration: Fig. 27. Transfer Clerk's Card Tray.] The Transfer Clerk's _card tray_ is shown in Fig. 27, and is made with compartments of sufficient dimensions to hold the number of cards expected to be on file in any one department at the same time. The cards are filed in numerical order. In a large concern the usual card─index method of guide cards is used, so as to render the work of finding the right card when wanted, easy and expeditious. =Tool─Room Methods.= A large number of small tools such as drills, taps, reamers, and the like, and also numerous jigs and fixtures of various kinds, are drawn daily from the Tool Room and returned there after being used. The problem of keeping track of these valuable tools, of knowing where to locate every tool that has been issued, and getting them back promptly after they have been used, is an important one.