Manganese claims have been registered near Mantua and Vinales, in the Province of Pinar del Rio, but time did not permit an extended study of those deposits. Valuable manganese deposits of known value are found also in the districts of Cienfuegos and Trinidad in the Province of Santa Clara. By far the largest deposits of this ore, and the only ones that are being extensively worked, are located in the Province of Oriente. The most westerly deposit of chrome visited was found in the eastern part of Havana province, and two others were located, one near Coliser, in the Province of Matanzas, another near Canasi, and a third near the automobile drive about half way between the City of Matanzas and Cardenas. In the province of Camaguey, only a few miles north of the city, valuable deposits of chrome were found quite accessible to the railroad for shipment. Other chrome deposits were found in Oriente; one near Holguin, another south of Nipe Bay, and three groups in the mountains not far from the coast between Punta Corda and Baracoa. All of the chrome deposits examined by these engineers were found in serpentinized basic rocks. The ore lies in lenticular and tabular masses, ranging in thickness from one to more than fifty feet. The ore is generally fine grained to medium coarse, and runs from spotted material, consisting of black grains of chromite ranging in diameter from 1/30 to 1/4 of an inch, embedded in light green serpentine, to a solid black material containing little or no visible serpentine. Most of the masses of ore are highly inclined and certain of them are exposed in ravines, on steep hillsides and in mountainous or hilly regions. The deposits west of Nipe Bay are in areas of moderate relief, and those near Camaguey are in an area of very low relief. The deposits in the eastern part of Oriente, which are the largest visited, are in a mountainous country and very difficult of access. In Havana Province small pockets of chrome ore have been found about two miles south of Canasi, ten miles from the railroad. A little mining has been done and about 600 tons of ore shipped. In Matanzas Province small deposits of chrome were visited on the “Jack” claim, seven miles northwest of the railroad station on Mocha, and on the Anna Maria claim ten miles west of Cardenas. The latter is only two miles from the railroad but no ore had been shipped from it. Considerable development work has been done on the “Jack” claim and about 450 tons of ore were on hand in February of 1918. Another promising claim was located in a group of several serpentine hills that rise from the comparatively level surface about a mile north of kilometer 36, on the automobile drive between Cardenas and Matanzas. The outcropping chrome and loose lumps of float, found on the surface, were of high grade, exceeding probably 50%.