40 NEW YORK STATE MUSEUM 



occurs in seams interbanded with the county gneiss ; also in dis- 

 seminated particles through the mass of the rock. The seams, of 

 which the heaviest is 4 or 5 feet thick, are rich in places, but the 

 general run, as shown by the accumulation of material on the sur- 

 face, is of considerably lower grade. There is little to be seen 

 in outcrop, as in fact exposures in that vicinity are quite limited. 

 The county rock appears to be a laminated biotite-hornblende gneiss 

 that has undergone injection by granite so as to exhibit as much 

 of the latter as of the original mineral aggregate. The granite 

 develops frequently a pegmatitic texture and is accompanied by 

 bands of white vein quartz. The ore seams, with the included 

 rock containing disseminated magnetite, conform in strike and dip. 

 The latter at the surface is about 45 ° northwest but is said to be- 

 come nearly vertical at the bottom of the prospecting shaft, which 

 had reached a depth of 165 feet in June 191 3. The strike is north- 

 east with the prevailing trend of the Highlands Precambric forma- 

 tions. The company has erected a mill on the property for the 

 purpose of concentrating the ore. The building is of sheet iron 

 and is equipped with crushers, a dryer and magnetic separators. 

 The latter are of the permanent magnet type, said to be a modified 

 form of the Carter apparatus. The ore crushed down to 1.5 inch 

 size, or less, falls in a thin stream in front of the horizontal mag- 

 nets arranged one above another; the magnetite is diverted from 

 the normal direction of fall by the attraction and passes into a 

 separate receptacle, while the tailings continue their course down- 

 ward from magnet to magnet without deflection. This method has 

 the objection that the very fine particles of gangue are entangled 

 more or less with the magnetite, as there is no jar or jigging move- 

 ment to aid in their separation, which is secured by the common 

 types of the drum and belt machines used in the Adirondack mills. 

 To obviate this difficulty it is proposed to equip the last of the 

 series of separators with an air-suction apparatus to draw off the 

 dust from the falling stream of ore and tailings. 



MINERAL WATERS 

 New York has held for a long time a leading position among the 

 states in the utilization of mineral waters. The different springs, 

 of which over two hundred have been listed as productive at one 

 time or another, yield a great variety of waters in respect to the 

 character and amount of their dissolved solids. There are some 

 that contain relatively large amounts of mineral ingredients and 



