CARGO TRANSFERENCE AT STEAMSHIP TERMINALS. 165 
names. ‘These are most extensively used. There is also the traveling-shop 
or gantry crane of universal adaptation, for transporting and adjusting the 
movable tracks. 
By means of this combination, cargoes can be assorted, raised, conveyed 
and distributed to and from any place upon the pier floor, or to the cars, drays, 
lighters, open yards and the warehouses, all without rehandling, and by 
means of circuit tracks and diverse paths, with ‘continuous rapidity. Pro- 
vision is also made for the other operations such as inspection, routing, 
weighing and checking. By means of gravity rollers extending into the 
cars, a load lowered by the hoists upon these rollers will pass by gravity 
into the cars, and in some instances to the ends of the cars. 
Capacity of Transferage.—With an average load of 6,000 pounds at 
nine miles an hour, to transfer 300 tons per hour, the average pier distance. 
of distribution being about 600 feet, would require eight trains including 
reserves. This number of trains can be increased to more than double, serv- 
ing five hatches, before any congestion is reached. 
Installation and Operative Costs.—It will be noted that great capacity 
can be readily obtained by adding trains. The cost of installation on an 
operative tonnage basis will be between one and two cents for each ton 
transferred between the ship and the tiered pile in the shed. 
By adjusting the layout to the volume of the freight, the installation 
expense can be made proportionate to the tonnage. 
Including tiering, the cost for manual labor varies between 30 and 40 
cents per ton. Variations from these figures may depend upon methods of 
bookkeeping or on exceptional circumstances. 
The following under certain conditions would be the operating costs by 
mechanical methods allowing margins for contingencies. 
Mechanical Operating Costs, 2,000 tons, Loaded in 9 Hours. 
5 conveyor men, 9 hours at 30 cents per hour..... $13.50 
10 hookmen, 9 hours at 30 cents per hour........ 27.00 
2QeWACHinetiy Ol -SHOrewieisit- ee see ee eds 4. 5.40 
AL SNRALUCIROSTLENDN S Sots hh Bie eee VON 0 To Cue HERO aac toes emia 10.80 
60 holdmen, 12 at each loading point............. 162.00 
Total wages 2,000 tons loaded................. $218.70 
