every man gets the habit, and the man going home at noon checks out with the others. For those who return, neither advantage. nor harm is done, while for those who do not, their check indicates that fact.

"After careful comparison of the merits of the various systems shown and others that have been investigated, it is believed that a combination of the central checking-in station idea and a system similar to that adopted by the Washington Navy Yard, presents, by far, the most satisfactory solution of this difficult and complicated problem, for ship yard purposes where a large proportion of the force is working outside the shops."

THE CHECKING-IN DEVICE AS USED AT THE WASHINGTON NAVY YARD.

This register is so simple as to hardly need any explanation. A child can operate it. It is exceptionally durable. Nothing to wear out or get out of order. Its serviceability therefore is almost limitless.

The construction involves a backing of sheet brass installed in a hardwood case. The sheet brass backing has rows of inverted V-shaped slots cut therein, in which the checks slide by means of a specially formed rivet.

One half of each slot (the inverted V) is exposed, the other half is hidden by a frame of metallic slats, so arranged that it can be slid from one side to the other, exposing always one-half of each slot.

The riveted checks ride freely in the slots but cannot be taken! from the board by anyone without authority. There is provided a place in one of the lower corners of each slot, with a spring attachment for removing or replacing the checks; the spring has to be pushed back by a pointed instrument to release the rivet, after which the check can be removed or replaced.

A glass paneled sliding door is provided which completely covers the register and prevents tampering with it when not in use. The right hand side of the cabinet is used as a bulletin board for posting orders or notices to employes.

The cost of maintenance is almost nothing, and the prices of the registers are within the reach of any institution, business, factory, schools, or others, so there cannot be anything prohibitive in their use. There are no clock works or mechanical con

trivances to get out of order or create embarrassment. It is absolutely positive in its action and results.

The Washington, D. C. Navy Yard, U. S. Naval Torpedo Station, Newport, R. I., Charleston, S. C. Navy Yard, Union. Twist Drill Co., Athol, Mass., Boesch-Lomb Optical Co., Rochester, N. Y., and other places have been using these registers for

in
Josis is a box at the exit end of the check house 25

Fes the Common Sense Register as adopted by the
y Yard and represents an employe in the act of
ply using his finger to push upward the number
pex of the inverted V-slot, when it passes over the
wys down in the other side of the groove or slot behind

FIG. 2.

Fig. 2 shows the Central Checking-in Station, Mare Island Navy Yard. Fails to meet requirements Da, Dg, Dh, Do, Dq.

Fig. 3 shows a line of workmen at Cramp's Ship Yard about to check-in. This is done here at several entrances by the men calling their check numbers out as they pass through the check house. The number is written down by a clerk in the time-keeping department. Two musters a day.

Fig. 4 shows check house of outside machinists at Newport News Shipbuilding and Engine Co. Outside machinists and shop machinists are handled as separate departments. Shop machin