756 



GEOLOGY OF OLD HAMPSHIEE COUNTY, MASS. 



1892. Beryl. Russell, Warwick. 



E. S. Dana. Sys. Min. Localities, p. 1059. 



1841. Calcite. Iceland Spar Wales. 



In gneiss. B. Hitchcock. Final Kept. Geol. Mass., p. 638. 



1897. Cerusite. Hatfield. 



At the lead mine the mineral occurs in small globular forms, with drusy 

 surfaces, and some of the globules are hollow. 



1896. Clinochlor. Blandford. 



Broad encrusting masses, 3 inches thick, of a uniaxial chlorite, which is 

 granular at the base but grows coarser upward, and grades into stout crystals 

 one-half inch across, which project freely from the surface. From tlie Bland- 

 ford soapstoue quarry, formerly Osborn's quarry. (See p. 85.) 



1896. Corundum. Emery. Middlefield. 



Found one-half mile north of the soapstone quarry at C. Smiths's. Traced 

 north from bowlders by Dr. H. S. Lucas. Shows quite large veins of blue 

 corundum. (See p. 81.) Springfield Eepublican, December 12,1896. 



1897. Corundum. Pelham. 



Crystals with perfect polished O face. Heating developed O cleavage. 

 Others with polished prism faces deeply fluted horizontally by the oscillation of 

 the unit pyramid face. (See p. 47.) 



1853. Cummingtonite. Hornblende. Cuiximington. 



Fibrous, resembling anthophyllite; color, ash-gray; in mica-slate. 

 Analyses of cummingtonite. 



Per cent. Per cent. 



SiO, 

 Al-0 

 FeO. 

 MgO 

 MnO 

 CaO 

 NaoO 

 K2O. 

 H:0. 



51.09 



trace 



.95 



32.07 



10.29 



1.50 



.75 



trace 



3.04 



99.69 



50.74 

 .89 



33.14 



10.31 

 1.77 



trace 

 .54 



J. L. Smith and G. J. Brush, Eeexamination of American minerals : Am. Jour. 

 Sci., 1st series, Vol. XYI, 1829, p. 48. 



