280 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
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G. Massive black tourmaline, Auburn, Maine. Sp. gr., 3.19. 
H. Massive black tourmaline, Paris, Maine. 
I. Black tourmaline, Calhao, Brazil. Sp. gr., 3.20. 
J. Black tourmaline, Haddam, Connecticut. 
G H. I. J. 
K. Black crystal, Nantic Gulf, Baffin Land. Sp. gr., 3.095. 
L. Black crystal, Stony Point, Alexander County, North Carolina. Sp. gr., 3.13. 
M. Brown tourmaline from near Colfax, Nevada County, California. Fine, radi- 
ating needles. Sp. gr., 3.065. Incomplete analysis by W. H. Melville. See Bull. 90. 
N. Chrome tourmaline from near Etchison, Montgomery County, Maryland. Analy- 
sis by T. M. Chatard. See Bull. 64. 
QO. Black tourmaline, Lost Valley, San Diego County, California. 
P. Black tourmaline, Ramona, San Diego County, California. 
Analyses O, P by W. T. Schaller. Hitherto unpublished. 
