364 Washingtonite, a new Mineral. 
Arr. IX.—On Washingtonite (a new Mineral), the discovery of 
Euclase in Connecticut, and additional notices of the supposed 
Phenakite of Goshen, and Calstron-baryte of Schoharie, N. Y.; 
by Cuarvtes Upnam Sueparp, M. D., Professor of a in 
the Medical College of the State of South Carolina. 
Tue first allusion to the substance in question is found on p. 
156, Vol. I, of my Treatise on Mineralogy (1835), where it is 
described as occurring in broad, laminated, imperfectly hexagonal 
masses at Washington, Conn., imbedded in a vein of quartz in 
mica-slate. It was again referred to (1837) in my mineralogical 
report of Connecticut, p. 146, as existing in rolled masses of quartz 
among the diluvium of South Britain. In 1838, two other local- 
ities were discovered by Messrs. T. S. Gory and W. W. Rop- 
man, then pupils of mine in mineralogy. That found by Mr. 
Goxp was in Litchfield, while that by Mr. Ropman was in Wes- 
terly, R. 1. Notices of these localities are contained in Vol. xxxv, 
p. 179, of this Journal, by these gentlemen respectively. 
A recent examination of this mineral leads me to think that it 
is better to bestow a new name upon the American mineral, than 
to continue to associate it with Crichtonite, from which it so 
plainly differs in several important particulars, or even to bring 
it under the Axotomous iron-ore of Mons, to which it is as 
little similar. I have therefore designated it from its first dis- 
covered repository, the town of Washington ; and if from the 
frequent repetition of this name in the American union, the ap- 
pellation be thought deficient in signification, it commends itself 
at least, on the ground of patriotism. 
Fig. 1. Fig. 2. 
PB 
Description.—The crystals, which are large and commis 
well formed, are represented in figures 1 and 2; to which also 
may be added, the regular six-sided table. 
ere: rhomboid: P on P=86°, as determined by the 
goniometer, on varnished planes. Plane o the most 
4 
