THE ADIRONDACK CRAPHITE DEPOSITS 



5* 



so that the images of the flake and the scale coincided. The max- 

 imum and minimum diameter of each of ten normal flakes was 

 measured in this way and the results averaged. The thin sections 

 of the graphitic schists were cut perpendicularly to the plane of the 

 schistosity and thus the graphite flakes appeared as long laths. The 

 length of these is a measure of the diameter of the flakes. The 

 average length is the result of ten measurements. The width of 

 these laths gives the thickness of the flakes. Other measurements 

 have been made upon flakes brushed off from hand specimens and 

 laid flat upon a microscopic slide. The concentrates were treated 

 in this same manner. All these measurements are fairly accurate. 

 The mill. The ore from the mine is hauled directly into the 

 mill. The concentration process is by the usual Adirondack wet 

 method. The process is briefly described as " crushing, rolling," 

 stamping by a battery of California stamps, " and buddling to a 70 

 per cent concentrate." 1 " The concentrates are said to average 

 about 3 per cent by weight of the ore mined." 2 ..." The 

 average output of the mine is 160 to 180 tons a day. " 3 . . . 

 " The milling process is kept secret." 



The American Graphite Company concentrates 





GRADE 



COARSE 

 FLAKE 



FINE 

 PRODUCT 



Average diameter 



.37 mm 



X 



.62 mm 



1 . 1 1 mm 



.23 mm 



.015 mm 



X 



.021. mm 

 .040 mm 

 .003 mm 



Maximum diameter 



Minimum diameter 





The concentrates are hauled by motor trucks down the steep 

 grade to Hague and there transferred to barges on Lake George 

 which carry it to Ticonderoga for final treatment in the finishing 

 mill there. The details of the refining process are not made public. 

 It is reported that in 1908 4 there were four Munson under-runner 

 burr mills and five Abbe pebble mills in use. Further details are 

 not available. 



1 Bastin, E. S., Mineral Resources, U. S. G. S., 1913, 2: 217. 



2 Kemp & Newland, 51st Ann. Rep't, N. Y. State Mus. 2: 539. 



3 Bastin, E. S. ibid. 



4 W. R. Ingalls, The Mineral Industry for 1908, 17: 493. 



