County,
where corundum is found associated with titaniferous iron ore. In other
localities, in Gaston and Rutherford Counties, the corundum was found
in a series of slates, and was regarded by Prof. Ebenezer Emmons, Chief
of the North Carolina Geological Survey, as belonging to the Taconic
system. At these places it is found associated with pyro-phyllite,
rutile, damourite and lazulite. Professor Genth says: "There are
reasons to believe that the pyrophyllite beds • in Orange, Chatham,
Moore and Montgomery Counties are analogous to the corundiferous strata
of Gaston County, and the same appears to be true for those at Graves'
Mountain, Lincoln County, Ga." At this locality there is also to be
found lazulite with rutile as well as at Crowder's Mountain in Gaston
County, N. C. The earliest reference to corundum in this country is
found in Silliman's Journal for 1819,1 in an article on the
mineralogy and geology of parts of South and North Carolina, by John
Dickson, who sent a number of specimens to illustrate the paper. Among
these was one nearly an inch in length and very like the East Indian
specimens, which Prof. Benjamin Silliman, Sr., of Yale College,
recognized as a very perfect hexagonal crystal of blue corundum. The
locality from which it came was subsequently found to be near
Andersonville, Laurens District, S. C, and it has lately yielded a
large amount of corundum mingled with zircon. The Massachusetts emery
deposits near Chester were first described by Dr. Charles T. Jackson2 and later by Professor Shepard8 and Dr. Smith.4
The Connecticut localities were described by Professor Shepard, and
that at Pelham, Mass., by J. H. Adams, a few years later; meanwhile the
Pennsylvania corundum, and that of Vernon, N. J., and Orange County, N.
Y., had been found. Dr. Smith writes5 that this mineral was
first discovered in North Carolina in 1846, but does not specify where
or by whom. Professor Shepard, in 1872, states6 that he had received an hexagonal prism
1 Am. J. Sci. I., Vol. 3, p. 4, 1819.
3 Am. J. Sci. n., Vol. 39, p. 88, Feb., 1865, and the Proc. Boston Soc. Nat. His. for 1864. 8 Am. J. Sci. II., Vol. 40, p. 112, Aug., 1865; Vol. 42, p. 42, Nov., 1866; Vol. 64, p. 256, Oct., 1868.
*
Am. J. Sci. II., Vol. 42, p. 83, Aug., 1866. • Am. J. Sci. III., Vol.
6, p. 180, Sept., 1873. •Am. J. Sci. III., Vol. 4, p. 175, Sept., 1872.
