90 NEW YORK STATE MUSEtlM 



60 per cent tricalcium phosphate, which is sold to fertilizer manu- 

 facturers. The low grade ores from the Harmony and Smith mines 

 are also concentrated. 



At B shaft on the Harmony a mechanical cobbing apparatus is 

 under course of construction, which will facilitate the separation 

 of the furnace and concentrating ores. After hoisting, the ore is 

 fed into a large size Blake crusher and is then carried by a con- 

 veyor belt to a double drum magnetic separator, where the magnetite 

 is removed for direct shipment. The mixed ore and rock goes to 

 the mill for additional treatment. 



Electric power is employed in the mills as well as for hoisting 

 and pumping at the mines. Most of the current required is supplied 

 from the central power station erected by Witherbee, Sherman & 

 Co. in 1902. The generator is of alternating type, 750 kw. capa- 

 city, directly connected to a 1000 h.p. Nordberg-Corliss engine. A 

 second power house is equipped with a 150 kw. generator, besides 

 hoisting and compressor apparatus. The mines are also connected 

 with the electric generating station at Wadhams Mills on the 

 Bouquet river and with a new plant on the Black river erected during 

 the past year. 



The Port Henry Iron Ore Co. has maintained steady operations 

 in mine ''21." A good deal of ore was taken from the bottom of 

 the open pit near the incline by blasting out the irregularities of the 

 floor and walls. Late in the year a vertical shaft was started between 

 mine '* 21 " and mine " 23," on the hanging side of the latter, and 

 encountered ore within a few feet of the surface. Some explora- 

 tion has been done on a property located between the Old Bed and 

 Harmony mines. 



The year 1905 was the most active one in the history of the dis- 

 trict. The quantity of ore hoisted by the two companies exceeded 

 650,000 tons. About 600,000 tons of lump ore and concentrates 

 were shipped, all of which was high grade magnetite carrying over 

 60 per cent iron. With the progressive policy of the companies in 

 extending mining operations and improving their installations, a 

 still larger output may be anticipated for the immediate future. 



Lyon Mountain. ' The mines at Lyon Mountain, on the Chateau- 

 gay branch of the Delaware & Hudson railroad, were operated 

 steadily throughout the year. Extensive improvements in both sur- 

 face and mining plants have been undertaken, the most important . 

 being the construction of a new mill which was begun early in the 

 fall. Additional facilities for mining and handling the ore have 

 been necessary to provide for the enlarged milling capacity. 



