THE MINING AND QUARRY INDUSTRY IQIO 39 



elsewhere in the Adirondacks. The lump ore goes to Blake crusTi- 

 ers, of which there are three of graduated size, and after screening 

 passes to a series of magnetic cobbing machines. These take out 

 the rich magnetite in coarse form which goes to storage bins for 

 shipment. The rest of the material is subjected to further reduc- 

 tion in Cornish and finishing rolls and is then conveyed to magnetic 

 separators of the belt type. The concentrates from these are de- 

 livered to separate storage bins. The shipping products are loaded 

 on cars by a gravity system. The company has its own railroad 

 which connects at Dolgeville with a branch of the New York 

 Central. ' ; ' ' 1 ' | 



Clinton hematites. The production of ore in the Clinton belt 

 showed a good gain in 1910. The larger part of the output came 

 from the western district in Wayne county, where the Furnaceville 

 Iron Co. and the Ontario Iron Ore Co. were active and shipped 

 regularly to Pennsylvania furnaces. The mines at Clinton were 

 operated by C. A. Borst who supplied ore mainly for paint manu- 

 facture. 



Dutchess county limonites. Though a renewed interest in the 

 limonite deposits of this section has been manifest during the last 

 year or two productive activity has been limited to the Amenia 

 mine which resumed work in April, 1910. This is one of the more 

 important properties which is credited with shipments of 200,000 

 tons of ore in the interval from 1870-90 when the mining indus- 

 try was at its height. The present operations are limited to open- 

 cut excavation near the surface, the old workings having been 

 rendered inaccessible by fire. The output is about 25 tons of 

 crushed ore a day. It is shipped to the furnace at New Canaan, 

 Conn. The pig iron made from the ore finds special application for 

 the manufacture of car wheels. 



MILLSTONES 



The quarrying and preparation of millstones, once a quite im- 

 portant industry in Ulster county, has shown a marked decline of 

 late years. The industry in Ulster county dates back more than a 

 century and for a long time has supplied a large share of the mill- 

 stones and disks or chasers used in the country. The market for 

 millstones, however, has been curtailed greatly by the increasing 

 favor shown for rolls, ball mills and other improved forms of grind- 

 ing machinery. The roller process has displaced almost entirely the 

 old type of cereal mills, particularly in grinding wheat flour. The 



