144 CORUNDUM;, ITS OCCURRENCE AND DISTRIBUTION. 
MARYLAND. 
Corundum has been reported as occurring in the vicinity of White- 
hall, Baltimore County, but no definite information can be obtained 
that any has been found here beyond a stray surface specimen. 
MASSACHUSETTS. 
Chester. — Emery in amphibolite. (See pp. -^8, 92, 134.) 
Hunt'mgtoii. — Emery in amphibolite. (See p. 137.) 
Pelham. — Corundum in saxonite. (See p. 53.) 
MONTANA. 
American Bar. — The lowest bar on the Missouri River on which 
sapphires have been found. (See p. lOG.) 
Anceny mine. — In syenite. (See p. 133.) 
Belf/rade.— (8ee pp'. 48, 133.) 
Bozem-an. — Fourteen miles southwest of this toAvn corundum i^ 
found in syenite. (See p. 133.) 
Cottonwood Creek. — In the gravels of this creek greenish-coloredl 
sapphires have been found. (See p. 111.) 
Dana Bar. — A bar in the Missouri River, in the gravels of which] 
sapphires have been found. (See p. 107.) 
Eldorado Bar. — Sapphires in the gravel. (See p. 107.) 
Emerald Bar. — The highest bar on the Missouri River in which 
sapphires have been found. (See p. 107.) 
French Bar. — Sapphires have been found in a small dike of andes- 
ite. (See p. 107.) 
Gallatin County. — Corundum in syenite. (See pp. 48, 133.) 
Magpie Gulch. — Pale-greenish sapphires have been found in the 
gravel. (See p. 107.) 
Metropolitan Bar. — Sapphires occur in tlie gravels. (See ]). 108.) 
Missouri River bars. — In the various bars along the Missouri River. 
18 miles east and northeast of Helena, sapphires have been found in 
the graveL (See p. 106.) 
N orris. — (See p. 110.) 
Roch Creek. — Sapphires of all colors are found in the gravel of this 
creek. (See p. 110.) 
Ruljy Bar. — Sapphires occur in an andesite dike. (See p. 44.) 
Spokane Bar. — A bar of the Missouri River where the most mining 
has been done for sapphires that occur in the gravels. (See p. 107.) 
Togo Gulch. — Blue sapphires occur in a dike of monchiquite. 
(Seep. 111.) 
NEVADA. 
Silver Peak. — Corundum has been reported from near this place. 
