The driving of laundry machinery, which is our next application, usually proves a profitable contract, according to reports. This fact arises from the intermittent use of the machinery. The heaviest service on motor will probably be found during the early part of each week, with a general falling off in work during the summer months, while the patrons of the laundry are away at the sea-shore or in the mountains. In this application, therefore, a 75 per cent. service would probably be an exception, with, probably, many instances where the service would fall below 50 per cent. The next application, model and pattern makers, are small users of power, as their occupation requires a large proportion of hand work. 50 per cent. service in the motor will be found a fair average maximum use, with instances as low as 20 or 25 per cent. The next application, direct power or belt elevators, is another application frequently met. The average service in the motor is also much smaller than in any other elevator application. Let us suppose a case of the familiar grip connected to the ordinary hand hoist, with a lifting capacity of 2,000 pounds. In this case the motor is in use only going up, and the usual brake is used in coming down. Connected to this elevator, in the loft of the building, we have a 5 H. P. motor wired to a cut-out on the ground floor. We will call the lift 45 feet and the time consumed per trip 1 minute. We will allow 60 full trips of the elevator at full load, at 2,000 lb. per trip, each day. This would approximate 10 car loads of merchandise handled by the elevator, which is certainly above the average. This motor, we will say, is on a ten hour day circuit. Its possible horse power hours, therefore, would be 5 H. P. for 10 hours, or 50 H. P. hours per day. 60 trips of 1 minute each gives us exactly 1 hour's service of the full 5 H. P. or 5 H. P. hours. To drive the shafting only while the elevator is coming down or idle would require about 150 volts or 1½ H. P., and if this was in constant operation the balance of the day, 9 hours, its total use on shafting would be 13½ H. P. hours, which, added to the 5 H. P. hours, gives us a grand total of 18½ H. P. hours, or 37 per cent. of the contract hours. If, however, the user of the motor avails himself of the cut-out box, and cuts the current out when the motor is not in use, the average use would drop to 20 or 25 per cent., instead of 37 per cent. In the case of a direct power passenger elevator, the use might possibly run up to 60 per cent., but this would be exceptional.