I38 NEW YORK STATE MUSEUM 



York no. 1 and no. 2, both of inconsiderable depth. Benson no. 

 1 farther to the west is reported by Smock to have a depth of 350 

 feet on the incline ; of its two levels the tipper is about 2 5 feet long 

 and the lower driven at a point 60 feet from the bottom of the slope 

 runs off in a southerly direction for 160 feet and then north 60 feet. 

 This pit supplied most of the shipping ore. Between Benson no. 

 1 and no. 2 an adit has been excavated into the hill on a lead 

 which in the interior develops into a lens some 60 or 70 feet long 

 and 20 feet wide. The Fuller and Essler pits are located at the 

 extreme west, the former being opened on a pod of ore 50 feet wide, 

 dipping 45 west. 



The distribution of the ore in disconnected bodies which pitch 

 and strike in all directions has probably resulted from the intrusion 

 of the granite. The bodies occupy approximately the same horizon 

 and have the aspect of an originally continuous band which has 

 been disrupted and faulted. The intrusion has exercised also a 

 metamorphic influence upon the deposits shown by the abundance 

 of garnet and hornblende that often replace the magnetite almost 

 completely. Well developed titanite crystals of unusual size are 

 found in the contact zone. 



The analysis below taken from Putnam's report, gives the com- 

 position of the Jayville ore. It was made from a sample of 500 

 tons mined in 1880 and shipped to the furnace at Alpine. It 

 represents the selected lump ore, sufficiently high in iron to be used 

 without concentration. 



Iron 56.72 



Titanium nil 



Phosphorus . 009 



Mines on Vrooman ridge, Fine. This locality is 4 miles north- 

 west of Oswegatchie on the Carthage and Adirondack Railroad, in 

 the town of Fine. Vrooman ridge is the first of the elevations 

 bordering the Oswegatchie river valley on the south. 



From a cursory examination of outcrops it appears that the 

 ridge is mainly composed of reddish hornblende gneiss, with one or 

 more included bands of dark pyritic schists and limestone which 

 are doubtless altered sediments. The ore deposits are associated 

 with the latter. They have been explored by shallow pits ; appar- 

 ently no active mining has been undertaken. So far as could 

 be determined by surface observations, there are two parallel 

 veins that strike about north and dip 50 or so to the west. On 



