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NEW YORK STATE MUSEUM 



safe to estimate that about 50 per cent of this consisted of soil, 

 gravel and clay, bringing the volume of manganiferous material to 

 625 cubic feet. Allowing approximately 135 pounds of clay and 

 gravel to the cubic foot and of the manganese about 100 pounds, 

 the contents of the mixture in this area would approximate 75 tons 

 or about 40 tons for the bog manganese. 



Hillsdale, Columbia County 



The manganese bog of the Palmer farm is situated 1 J miles south- 

 west of North Hillsdale between two small hills, 1340 and 1390 feet 

 in elevation, respectively. As in the Gott-Mesick bog this one, 



Fig. 2 Palmer manganese bog, North Hillsdale, N. Y. 



because of its small area, is also not shown on the topographic map, 

 but it is about one-half of a mile long and one-fourth of a mile wide 

 with the greater portion of it forested and watery, serving as a 

 source for a small southeasterly and a northeasterly flowing brook. 

 In the bed of the southeasterly flowing brook, not far from the 

 outlet of the bog, infrequent brownish black subspherical nodules of 

 bog manganese, averaging about one-half of an inch in diameter, 

 were found. Upon following up the stream, these led to the discovery 

 of their source on the northwestern side of the bog. The accompany- 

 ing diagram (figure 2) presents the main features of this occurrence. 



