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NEW YORK STATE MUSEUM 



40 to 50 per cent iron. It is all concentrated at the mine. At 

 present two shafts are worked, but plans have been formed for 

 the extension of operations so that an enlarged output may be 

 anticipated for the future. 



The Palmer Hill mines, in the same district, have likewise been 

 very productive, but are now closed down. They resemble the 

 deposits at Lyon Mountain, the magnetite impregnating a zone 

 in the country gneiss, and yield an excellent low phosphorus ore. 

 An interesting feature is the occurrence of fluorspar which forms 

 one of the components' of a rock exposed near the deposits. 



The Winter, Cook and Mace mines situated on a ridge adjacent 

 to Arnold Hill may be mentioned among those that have been 

 prominent producers of magnetite ore. They have long since been 

 inactive, though they can not be regarded as exhausted. 



A number of mines occur in this vicinity which have been ex- 

 ploited at different times in the past. An endeavor was made to 

 locate these deposits, so far as possible, and to obtain a suite of 

 specimens illustrative of their character and geologic surroundings. 



A short visit was also paid to the old mines in the Saranac 

 valley. 



With the exception of the deposits of titaniferous ores at Split 

 Rock and Lake Sanford, none of the mines in Essex county and 

 other sections of the Adirondacks was examined and another 

 season will be required to complete the field work. 



An awakening of interest in the iron ore resources of the State 

 has been manifest in the last year, and this office has received 

 frequent requests for information on the subject. Unfortunately, 

 there is little published material now available, as the only com- 

 prehensive description is that contained in bulletin no. 7 of the 

 Museum, issued in 1889, and now out of print. The present 

 investigation has been undertaken with a view of supplying this 

 deficiency and is being carried out by D. H. Newland. 



Building stones. The building stones of the State are varied 

 and important and it is purposed to enter upon a detailed study 

 of them that will be commensurate with the public demand for 

 information thereupon. The sandstones have been taken up for 

 immediate investigation and a portion of the season was spent 

 by C. A. Hartnagel in the acquisition of data concerning them. 

 These field observations will be supplemented so far as practicable 

 by physical and chemical tests in the laboratory. 



The lowest sandstone formation utilized for building purposes is 

 the Potsdam sandstone. Its most extensive outcrops are along the 

 northwestern and northern borders of the Adirondacks, in Jefferson, 



