26 



THE CUBA REVIEW 



water or a loading station off shore ; so the type of handling equipment decided upon 

 was a cantilever projecting into the roadstead, with its foundation at the water's edge, 

 and a conve3or discharging to the holds of a vessel anchored under the end of this 

 cantilever. 



The ore of the Ponupo Manganese Co., which is of the character indicated by its 

 name, highly magniferous, is won in open cuttings, and brought by a short line of rail- 

 road to a bin at the inshore end of the cantilever. It is not, however, taken directly by 

 the conveyor of the latter, but runs into a 5-ton skip, and is hoisted to the summit of a 

 hill, just back of the cantilever. Here it discharges to a hopper which feeds directly to 

 an Allis-Chalmers Gates breaker. This crusher delivers its product, through a chute, to 

 a bin quarried out of the rock, which has a storage capacity of 11,000 tons. The axis of 

 the bin is in line with the cantilever. Under the center of the bin is a tunnel, through 

 which a 30-in. Robins belt conveyor runs, con>:-nuing on out over the cantilever, and 

 returning on the under side of the latter to complete the circuit.' The cantilever rises in 

 a gentle slope from the mouth of the tunnel, and then falls in a steep grade towards the 

 discharge end. The conveyor belt is 410 ft. long and will handle ore at the rate of 900 

 tons or more hourly. 



Of the other companies above mentioned, all have thus far confined their efforts to 

 exploration work, or at least what would be known by that name on the Michigan- 

 Minnesota iron ranges ; but further developments of considerable interest, including the 

 location in Cuba of blast furnace plants and steel mills for export trade, supplied in part 

 with South American ores, may be looked for in the not far distant future. 



The shipments of Cuban iron ore by the Spanish-American Iron Co. were 1,028,000 

 tons during 1913, an increase over 1912 of over 100,000 tons. 



Here there is a long stock yard equipped with tv/o motor-operated ore bridges, each 

 having a main span of 175 ft., and a cantilever extension on the water side 90 ft. in 

 lensth, to the end of which is hinged an additional 60 ft., to carry the grab buckets out 



Steam shovel at work in the mines of the Spanish-American Iron Co. 



